chore(deps): update actions/cache action to v4 (#502)

Co-authored-by: gabe565-renovate[bot] <gabe565-renovate[bot]@users.noreply.github.com>

.github/workflows/release.yaml

@@ -107,7 +107,7 @@ jobs:
           cache-dependency-path: docs/requirements.txt
 
       - name: MkDocs cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: docs/.cache
           key: ${{ runner.os }}-mkdocs-${{ github.sha }}