Run builds/tests with Java 21

Author: chadlwilson

.github/workflows/pr_workflow.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Set up JDK
         uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
         with:
-          java-version: 17
+          java-version: 21
           distribution: temurin
       - name: Test with Gradle
         run: ./gradlew assemble check

.github/workflows/release.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Set up JDK
         uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
         with:
-          java-version: 17
+          java-version: 21
           distribution: temurin
       - name: Release
         run: ./gradlew verifyExpRelease githubRelease

.github/workflows/test_and_build.yml

@@ -20,7 +20,7 @@ jobs:
       - name: Set up JDK
         uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
         with:
-          java-version: 17
+          java-version: 21
           distribution: temurin
       - name: Test with Gradle
         run: ./gradlew assemble check
@@ -47,7 +47,7 @@ jobs:
       - name: Set up JDK
         uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
         with:
-          java-version: 17
+          java-version: 21
           distribution: temurin
       - name: Test with Gradle
         run: ./gradlew githubRelease