use newer java in CI

Author: angryziber

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions/setup-java@v1
         with:
-          java-version: 11
+          java-version: 17
       - name: Build
         run: ./gradlew --info build
       - name: Test jvm2dts