ci: upgrade actions/cache to v4

Author: jiazengp

.github/workflows/deployment.yml

@@ -27,7 +27,7 @@ jobs:
           node-version: 20
 
       - name: Cache pnpm modules
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: ~/.pnpm-store
           key: ${{ runner.os }}-${{ hashFiles('**/pnpm-lock.yaml') }}