Bump actions/checkout from 2 to 3 (#112)

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

Author: dependabot[bot]

.github/workflows/go.yml

@@ -16,7 +16,7 @@ jobs:
       matrix:
         go: [ '1.14', '1.15' ]
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
 
     - name: Pre-run
       run: |