Bump actions/setup-java from 2.3.1 to 2.4.0

Bumps [actions/setup-java](https://github.com/actions/setup-java) from 2.3.1 to 2.4.0.
- [Release notes](https://github.com/actions/setup-java/releases)
- [Commits](actions/setup-java@v2.3.1...v2.4.0)

---
updated-dependencies:
- dependency-name: actions/setup-java
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/main.yml

@@ -24,7 +24,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Set up JDK ${{ matrix.java-version }}
-        uses: actions/setup-java@v2.3.1
+        uses: actions/setup-java@v2.4.0
         with:
           distribution: 'zulu'
           java-version: ${{ matrix.java-version }}

.github/workflows/pullrequest.yml

@@ -20,7 +20,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Set up JDK ${{ matrix.java-version }}
-        uses: actions/setup-java@v2.3.1
+        uses: actions/setup-java@v2.4.0
         with:
           distribution: 'zulu'
           java-version: ${{ matrix.java-version }}