Update Java build matrix

Author: PhilWakelin

.github/workflows/java.yml

@@ -13,7 +13,6 @@ jobs:
     name: Build Maven
 
     runs-on: ubuntu-latest
-    continue-on-error: ${{ matrix.experimental }}
     strategy:
       matrix:
         jdk: [8, 11, 17, 21]
@@ -33,14 +32,10 @@ jobs:
     name: Build Maven Wrapper
 
     runs-on: ubuntu-latest
-    continue-on-error: ${{ matrix.experimental }}
     strategy:
       matrix:
-        jdk: [8, 11]
-        experimental: [false]
-        include:
-          - jdk: 17
-            experimental: true
+         jdk: [8, 11, 17, 21]
+         
     steps:
       - uses: actions/checkout@v3
       - name: Set up JDK ${{ matrix.jdk }}
@@ -56,14 +51,10 @@ jobs:
     name: Build Gradle
 
     runs-on: ubuntu-latest
-    continue-on-error: ${{ matrix.experimental }}
     strategy:
       matrix:
-        jdk: [8, 11]
-        experimental: [false]
-        include:
-          - jdk: 17
-            experimental: true
+         jdk: [8, 11, 17, 21]
+         
     steps:
     - uses: actions/checkout@v3
     - name: Set up JDK ${{ matrix.jdk }}
@@ -75,3 +66,6 @@ jobs:
       uses: gradle/gradle-build-action@bd5760595778326ba7f1441bcf7e88b49de61a25 # v2.6.0
       with:
         arguments: bootWar -Pjava_version=${{ matrix.jdk }}
+
+      with:
+        arguments: bootWar -Pjava_version=${{ matrix.jdk }}