feat: upgrade actions/cache to v4

Author: iflabsfish

.github/workflows/ci.yml

@@ -38,7 +38,7 @@ jobs:
 
       - name: Restore Yarn cache
         id: yarn-cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: |
             node_modules
@@ -69,7 +69,7 @@ jobs:
 
       - name: Restore Yarn cache
         id: yarn-cache
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: |
             node_modules