Update actions/setup-java action to v4 (#6)

Author: renovate[bot]

.github/workflows/maven-publish.yml

@@ -18,7 +18,7 @@ jobs:
     steps:
     - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
     - name: Set up JDK 21
-      uses: actions/setup-java@0ab4596768b603586c0de567f2430c30f5b0d2b0 # v3
+      uses: actions/setup-java@99b8673ff64fbf99d8d325f52d9a5bdedb8483e9 # v4
       with:
         java-version: '21'
         distribution: 'temurin'

.github/workflows/maven.yml

@@ -22,7 +22,7 @@ jobs:
     steps:
     - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4
     - name: Set up JDK 21
-      uses: actions/setup-java@0ab4596768b603586c0de567f2430c30f5b0d2b0 # v3
+      uses: actions/setup-java@99b8673ff64fbf99d8d325f52d9a5bdedb8483e9 # v4
       with:
         java-version: '21'
         distribution: 'temurin'