Let the fabric module really use Java 17 (#4231)

* Let the fabric module really use java 17

* Remove unnecessary target/source compat; handled by indra instead

bootstrap/fabric/build.gradle.kts

@@ -5,9 +5,10 @@ plugins {
     id("com.modrinth.minotaur") version "2.+"
 }
 
-java {
-    targetCompatibility = JavaVersion.VERSION_17
-    sourceCompatibility = JavaVersion.VERSION_17
+indra {
+    javaVersions {
+        target(17)
+    }
 }
 
 dependencies {