Update github action versions

Author: memowe

.github/workflows/checks_tests_docs.yml

@@ -9,8 +9,8 @@ jobs:
       matrix:
         python-version: ["3.12", "3.13", "3.14"]
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@v6
+      - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
           cache: pip
@@ -31,16 +31,16 @@ jobs:
       name: github-pages
       url: ${{ steps.deploy.outputs.page_url }}
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@v6
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.14"
           cache: pip
       - run: pip install ".[docs,strategies]"
       - run: pdoc -o .api_docs pygexml
       - run: tree .api_docs
-      - uses: actions/upload-pages-artifact@v3
+      - uses: actions/upload-pages-artifact@v5
         with:
           path: .api_docs
       - id: deploy
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v5

.github/workflows/publish.yml

@@ -13,13 +13,13 @@ jobs:
     needs: checks-and-tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@v6
+      - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
       - run: pip install build
       - run: python -m build
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: dist
           path: dist/
@@ -33,7 +33,7 @@ jobs:
     permissions:
       id-token: write
     steps:
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v8
         with:
           name: dist
           path: dist/