Bump actions/checkout from 2 to 3.1.0 (knqyf263#209)

Author: dependabot[bot]

Diff for: .github/workflows/release.yaml

@@ -19,7 +19,7 @@ jobs:
         with:
           go-version: ${{ env.GO_VERSION }}
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3.1.0
         with:
           fetch-depth: 0
       - name: Release

Diff for: .github/workflows/test.yaml

@@ -15,7 +15,7 @@ jobs:
     name: Test
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3.1.0
 
       - name: Set up Go
         uses: actions/setup-go@v2