Bump actions/setup-java from 4.1.0 to 4.2.1

Bumps [actions/setup-java](https://github.com/actions/setup-java) from 4.1.0 to 4.2.1.
- [Release notes](https://github.com/actions/setup-java/releases)
- [Commits](actions/setup-java@v4.1.0...v4.2.1)

---
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>

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Set up JDK 8
-      uses: actions/setup-java@v4.1.0
+      uses: actions/setup-java@v4.2.1
       with:
         java-version: '8'
         distribution: 'temurin'
@@ -62,7 +62,7 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Set up JDK 8
-      uses: actions/setup-java@v4.1.0
+      uses: actions/setup-java@v4.2.1
       with:
         java-version: '8'
         distribution: 'temurin'