Bump the github-actions group with 2 updates (#680)

Author: dependabot[bot]

.github/workflows/main.yml

@@ -45,7 +45,7 @@ jobs:
 
     - name: Upload coverage data
       if: matrix.os != 'windows-2022'
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: coverage-data-${{ matrix.python-version }}
         path: '${{ github.workspace }}/.coverage.*'
@@ -70,7 +70,7 @@ jobs:
         run: uv pip install --system coverage[toml]
 
       - name: Download data
-        uses: actions/download-artifact@v6
+        uses: actions/download-artifact@v7
         with:
           path: ${{ github.workspace }}
           pattern: coverage-data-*
@@ -86,7 +86,7 @@ jobs:
 
       - name: Upload HTML report
         if: ${{ failure() }}
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: html-report
           path: htmlcov