chore(deps): update actions/cache action from vv4 to v5

Author: renovate[bot]

.github/workflows/firebase-hosting-merge.yml

@@ -20,7 +20,7 @@ jobs:
           node-version: 24.14.1
       - name: Cache node modules
         id: cache-npm
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         env:
           cache-name: cache-node-modules
         with:

.github/workflows/firebase-hosting-pull-request.yml

@@ -14,7 +14,7 @@ jobs:
           node-version: 24.14.1
       - name: Cache node modules
         id: cache-npm
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         env:
           cache-name: cache-node-modules
         with: