chore(deps): update actions/checkout action to v6 (#37)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/build_container.yml

@@ -15,7 +15,7 @@ jobs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
     steps:
       - name: Source checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: 'Setup yq'
         uses: dcarbone/[email protected]
@@ -153,7 +153,7 @@ jobs:
       - create-multi-arch-manifests
     steps:
       - name: Source checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Update Docker Hub Description
         uses: peter-evans/dockerhub-description@v5

.github/workflows/ci.yaml

@@ -14,7 +14,7 @@ jobs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
     steps:
       - name: Source checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: 'Setup yq'
         uses: dcarbone/[email protected]
@@ -30,7 +30,7 @@ jobs:
       matrix: ${{ fromJson(needs.setup-matrix.outputs.matrix) }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Extract version number
         id: extract_version

.github/workflows/markdownlint.yml

@@ -17,7 +17,7 @@ jobs:
   markdown-lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: DavidAnson/markdownlint-cli2-action@v21
         with:
           globs: '**/*.md'

.github/workflows/security_scanning.yml

@@ -16,7 +16,7 @@ jobs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
     steps:
       - name: Source checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: 'Setup yq'
         uses: dcarbone/[email protected]
@@ -36,7 +36,7 @@ jobs:
       matrix: ${{ fromJson(needs.setup-matrix.outputs.matrix) }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Extract version number
         id: extract_version

.github/workflows/shellcheck.yml

@@ -22,7 +22,7 @@ jobs:
       actions: read
     steps:
     - name: Repository checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         # Differential ShellCheck requires full git history
         fetch-depth: 0