build(deps): bump actions/checkout from 3 to 4 (#9)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/main.yml

@@ -16,7 +16,7 @@ jobs:
       matrix:
         go: [ '1.22', '1.21', '1.20', '1.13' ]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up Go
         uses: actions/setup-go@v5
         with: