Bump actions/setup-java from v1.4.3 to v2

Bumps [actions/setup-java](https://github.com/actions/setup-java) from v1.4.3 to v2.
- [Release notes](https://github.com/actions/setup-java/releases)
- [Commits](actions/setup-java@v1.4.3...8764a52)

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

.github/workflows/maven.yml

@@ -39,7 +39,7 @@ jobs:
         restore-keys: |
           ${{ runner.os }}-maven-
     - name: Set up JDK ${{ matrix.java }}
-      uses: actions/setup-java@v1.4.3
+      uses: actions/setup-java@v2
       with:
         java-version: ${{ matrix.java }}
     - name: Build with Maven