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

Author: renovate[bot]

.github/workflows/hugo.yaml

@@ -54,7 +54,7 @@ jobs:
         if: github.event.pull_request
 
       - name: Upload artifact
-        uses: actions/upload-artifact@330a01c490aca151604b8cf639adc76d48f6c5d4 # v5.0.0
+        uses: actions/upload-artifact@b7c566a772e6b6bfb58ed0dc250532a479d7789f # v6.0.0
         with:
           name: ${{ env.artifact_name }}
           path: ${{ env.source_dir }}/public