Bump actions/checkout from v2.3.3 to v2.3.4

Bumps [actions/checkout](https://github.com/actions/checkout) from v2.3.3 to v2.3.4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2.3.3...5a4ac90)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout scm
-        uses: actions/checkout@v2.3.3
+        uses: actions/checkout@v2.3.4
       - name: Set up JDK 8
         uses: actions/setup-java@v1
         with:
@@ -37,7 +37,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout scm
-        uses: actions/checkout@v2.3.3
+        uses: actions/checkout@v2.3.4
       - name: Set up JDK 11
         uses: actions/setup-java@v1
         with: