Correct gradle argument

Author: SoftlySplinter

.github/workflows/java.yml

@@ -82,4 +82,4 @@ jobs:
     - name: Build with Gradle
       uses: gradle/gradle-build-action@bd5760595778326ba7f1441bcf7e88b49de61a25 # v2.6.0
       with:
-        arguments: build -Pjava_version=${{ matrix.jdk }}
+        arguments: bootWar -Pjava_version=${{ matrix.jdk }}