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

Author: renovate-bot

.github/workflows/ci.yml

@@ -10,7 +10,7 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: lint
         uses: reviewdog/action-golangci-lint@v2
   test:
@@ -24,7 +24,7 @@ jobs:
           - ubuntu-latest
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-go@v2
         with:
           go-version: ${{ matrix.go_version }}