Revert "edit gin.yml to checkout, setup go, cache"

This reverts commit a61c9c6f6da99c3797bb4e7c5bb38b9435b1460a.

.github/workflows/gin.yml

@@ -54,17 +54,17 @@ jobs:
       TESTTAGS: ${{ matrix.test-tags }}
       GOPROXY: https://proxy.golang.org
     steps:
-      - name: Checkout Code
-        uses: actions/checkout@v5
-        with:
-          ref: ${{ github.ref }}
-
       - name: Set up Go ${{ matrix.go }}
         uses: actions/setup-go@v6
         with:
           go-version: ${{ matrix.go }}
           cache: false
 
+      - name: Checkout Code
+        uses: actions/checkout@v5
+        with:
+          ref: ${{ github.ref }}
+
       - uses: actions/cache@v4
         with:
           path: |