Update java and setup-java version & java provider

Author: LeeTibbert

.github/workflows/ci.yml

@@ -11,15 +11,15 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-22.04, macos-13]
-        java: [ '17' ]
+        java: [ '21' ]
     runs-on: ${{ matrix.os }}
     steps:
     - name: Checkout current branch (full)
       uses: actions/checkout@v3
     - name: Setup Java
-      uses: actions/setup-java@v3
+      uses: actions/setup-java@v4
       with:
-          distribution: 'adopt'
+          distribution: 'zulu'
           java-version: ${{ matrix.java }}
           cache: 'sbt'
     - name: Run tests (${{ matrix.os }}) Java ${{ matrix.java }}