Merge pull request #5 from yuzawa-san/dependabot/github_actions/actio…

…ns/checkout-3

Bump actions/checkout from 2 to 3

.github/workflows/build.yml

@@ -26,7 +26,7 @@ jobs:
       security-events: write
     name: Build on ${{ matrix.os }} on Java ${{ matrix.java }}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: gradle/wrapper-validation-action@v1
       - name: Set up JDK ${{ matrix.java }}
         uses: actions/setup-java@v2