chore: checkout code first in CI (#2347)

setup-go has built-in functionality for caching and restoring go modules and build outputs. The action defaults to
search for the dependency file - go.sum in the repository root, and uses its hash as a part of the cache key.
To use the cache, we should first checkout code. Otherwise setup-go can't find go.sum and use/restore cache.
Related: https://github.com/actions/setup-go#caching-dependency-files-and-build-outputs

Signed-off-by: Gaius <gaius.qi@gmail.com>

.github/workflows/lint.yml

@@ -15,13 +15,13 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 30
     steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
       - uses: actions/setup-go@v4
         with:
           go-version: '1.20'
 
-      - name: Checkout code
-        uses: actions/checkout@v3
-
       - name: Golangci lint
         uses: golangci/golangci-lint-action@v3
         with: