chore(deps): update actions/upload-artifact action to v6 (#12)

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

Author: renovate[bot]

.github/actions/upload_test_coverage_report/action.yml

@@ -53,7 +53,7 @@ runs:
         token: ${{ inputs.token }}
 
     - name: Upload artifact
-      uses: actions/upload-artifact@v5
+      uses: actions/upload-artifact@v6
       with:
         name: ${{ inputs.filename }}
         path: ${{ inputs.output_path }}