chore(build): upgrade actions/checkout to v2
diff --git a/.github/workflows/master-pr-build.yml b/.github/workflows/master-pr-build.yml
index d62b3b8..6829d56 100644
--- a/.github/workflows/master-pr-build.yml
+++ b/.github/workflows/master-pr-build.yml
@@ -28,7 +28,7 @@
       matrix:
         java: [ '1.8', '11' ]
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
       - name: Set up JDK ${{ matrix.java }}
         uses: actions/setup-java@v1
         with:
diff --git a/.github/workflows/master-push-build.yml b/.github/workflows/master-push-build.yml
index 30ad1ad..09d4ceb 100644
--- a/.github/workflows/master-push-build.yml
+++ b/.github/workflows/master-push-build.yml
@@ -28,7 +28,7 @@
       matrix:
         java: [ '1.8', '11' ]
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
       - name: Set up JDK ${{ matrix.java }}
         uses: actions/setup-java@v1
         with: