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

Author: renovate[bot]

.github/workflows/cloudflare-pages.yml

@@ -26,7 +26,7 @@ jobs:
           node-version: "19"
 
       - name: Cache dependencies
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.npm
           key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}
@@ -46,7 +46,7 @@ jobs:
           extended: true
 
       - name: Cache Hugo modules
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: /tmp/hugo_cache
           key: ${{ runner.os }}-hugomod-${{ hashFiles('**/go.sum') }}