chore(deps): update actions/cache action to v5

Author: renovate[bot]

.github/workflows/deploy.yaml

@@ -36,7 +36,7 @@ jobs:
           python-version: 3.x
       - run: echo "cache_id=$(date --utc '+%V')" >> $GITHUB_ENV
       - name: Cache 📦
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           key: mkdocs-material-${{ env.cache_id }}
           path: .cache