Update test-pr.yml

Author: tronghn

.github/workflows/test-pr.yml

@@ -13,7 +13,7 @@ jobs:
         with:
           go-version: '1.21'
           check-latest: true
-      - uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # ratchet:actions/cache@v3
+      - uses: actions/cache@13aacd865c20de90d75de3b17ebe84f7a17d57d2 # ratchet:actions/cache@v4
         with:
           path: |
             ~/.cache/go-build