Update GitHub actions workflow for Java 21

Author: ERSUCC

.github/workflows/main.yml

@@ -7,15 +7,19 @@ on:
 jobs:
   build-and-test:
     runs-on: ubuntu-latest
-
     steps:
-      - uses: actions/checkout@v2
-
-      - uses: olafurpg/setup-scala@v10
+      - uses: actions/setup-java@v5
         with:
-          java-version: openjdk@1.17.0
+          distribution: zulu
+          java-version: 21.0.2
+          java-package: jdk+fx
+          cache: sbt
+
+      - uses: sbt/setup-sbt@v1
 
       - uses: r-lib/actions/setup-r@v2
 
-      - run: sbt -v update compile
-      - run: sbt -v test
+      - name: Build and Test
+        run: |
+          sbt -v update compile
+          sbt -v test

project/build.properties

@@ -1 +1 @@
-sbt.version=1.7.2
+sbt.version=1.10.1