test: upgrade actions/cache to v4

.github/workflows/app-test.yml

@@ -43,7 +43,7 @@ jobs:
           cache-dependency-path: '**/package-lock.json'
 
       - name: Cache dependencies
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: npm-cache
         with:
           path: |

.github/workflows/documents.yml

@@ -38,7 +38,7 @@ jobs:
 
       # cache node_modules
       - name: Cache dependencies
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         id: npm-cache
         with:
           path: |