Update actions/checkout to v6

.github/workflows/checks.yml

@@ -11,14 +11,14 @@ jobs:
     timeout-minutes: 1
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - run: shellcheck --color=always --shell=bash --exclude=SC2086,SC2059,SC2046,SC2235,SC2002,SC2206,SC2068,SC2207,SC2013 *.sh activate
 
   codespell:
     timeout-minutes: 3
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - run: sudo apt install -y codespell || (sudo apt update && sudo apt install -y codespell)
       - run: codespell --enable-colors -L ot,bu,hel,fom,olt $(git ls-files)
 
@@ -27,7 +27,7 @@ jobs:
     timeout-minutes: 1
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - run: |
           if git grep -E '```(python3|py$|py3)' '*.md'; then
             echo 'Error: Jou code in markdown files must be marked with ```python'
@@ -38,7 +38,7 @@ jobs:
     timeout-minutes: 1
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - run: wget https://github.com/editorconfig-checker/editorconfig-checker/releases/download/v3.2.0/ec-linux-amd64.tar.gz
       - name: Verify checksum
         run: |
@@ -53,7 +53,7 @@ jobs:
     timeout-minutes: 2
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v5
         with:
           python-version: '3.13'
@@ -70,7 +70,7 @@ jobs:
     timeout-minutes: 2
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0  # Fetch the whole Git history, used for release description
       - run: ./release.sh --github-token "${{ secrets.GITHUB_TOKEN }}" --dry-run

.github/workflows/linux.yml

@@ -31,7 +31,7 @@ jobs:
           - { llvm-version: 20, opt-level: '-O2' }
           - { llvm-version: 20, opt-level: '-O3' }
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0  # Fetch the whole Git history for bootstrapping
       - name: "Install apt packages"

.github/workflows/macos.yml

@@ -16,7 +16,7 @@ jobs:
     outputs:
       needed: ${{ steps.check.outputs.run }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - id: check
         run: |
           if [ "$GITHUB_EVENT_NAME" == "workflow_dispatch" ]; then
@@ -71,7 +71,7 @@ jobs:
           - { llvm-version: 20, opt-level: '-O2' }
           - { llvm-version: 20, opt-level: '-O3' }
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0  # Fetch the whole Git history for bootstrapping
       - run: brew install bash diffutils llvm@${{ matrix.params.llvm-version }}
@@ -95,5 +95,5 @@ jobs:
     permissions:
       issues: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - run: ./create_issue.sh "${{ secrets.GITHUB_TOKEN }}" "Running tests on MacOS failed"

.github/workflows/release.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0  # Fetch the whole Git history, used for release description
       - run: ./release.sh --github-token "${{ secrets.GITHUB_TOKEN }}"

.github/workflows/valgrind.yml

@@ -16,7 +16,7 @@ jobs:
     outputs:
       needed: ${{ steps.check.outputs.run }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - id: check
         run: |
           if [ "$GITHUB_EVENT_NAME" == "workflow_dispatch" ]; then
@@ -59,7 +59,7 @@ jobs:
           - { llvm-version: 20, opt-level: '-O3' }
       fail-fast: false
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0  # Fetch the whole Git history for bootstrapping
       - name: "Install apt packages"
@@ -80,5 +80,5 @@ jobs:
     permissions:
       issues: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - run: ./create_issue.sh "${{ secrets.GITHUB_TOKEN }}" "Running tests with valgrind failed"

.github/workflows/vm.yml

@@ -36,6 +36,7 @@ jobs:
     outputs:
       include: ${{ steps.decide.outputs.include }}
     steps:
+      - uses: actions/checkout@v6
       - name: "Decide which VMs run"
         id: decide
         run: |
@@ -91,7 +92,7 @@ jobs:
       matrix:
         include: ${{ fromJson(needs.decide.outputs.include) }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0  # Fetch the whole Git history for bootstrapping
 
@@ -166,7 +167,7 @@ jobs:
     permissions:
       issues: write
     steps:
-      - uses: actions/checkout@v4  # needed to get create_issue.sh
+      - uses: actions/checkout@v6  # needed to get create_issue.sh
 
       - name: "Download the dummy files that indicate which VMs succeeded"
         uses: actions/download-artifact@v4  # Downloads all artifacts

.github/workflows/windows.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: windows-latest
     timeout-minutes: 10  # may need to bootstrap
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0  # Fetch the whole Git history for bootstrapping
       # Do not use --small because it relies on a previously built zip
@@ -134,7 +134,7 @@ jobs:
     runs-on: windows-latest
     timeout-minutes: 20  # may need to bootstrap
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0  # Fetch the whole Git history for bootstrapping
       - run: ./windows_setup.sh --small
@@ -159,7 +159,7 @@ jobs:
     runs-on: windows-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           path: repo
       - uses: actions/download-artifact@v4