chore: Update CI to run with JDK 23

Author: rholshausen

.github/workflows/gradle.yml

@@ -15,11 +15,11 @@ jobs:
         module: [ core, 'consumer -x :consumer:junit:clojureTest', provider, pact-specification-test ]
     steps:
     - uses: actions/checkout@v2
-    - name: Set up JDK 21
+    - name: Set up JDK 23
       uses: actions/setup-java@v3
       with:
         distribution: temurin
-        java-version: 21
+        java-version: 23
     - name: Cache Gradle packages
       uses: actions/cache@v2
       with:
@@ -35,7 +35,7 @@ jobs:
     strategy:
       matrix:
         module: [ core, consumer, provider, pact-specification-test ]
-        jdk: [ 17, 18, 19 ]
+        jdk: [ 17, 18, 19, 21, 22 ]
     steps:
       - uses: actions/checkout@v2
       - name: Set up JDK