chore(deps): update actions/checkout action to v3

Author: renovate-bot

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-go@v2
         with:
           go-version: ${{ matrix.go }}