force java version for kotlin/java so it wont say "version mismatch" anymore

build.gradle

@@ -33,6 +33,16 @@ loom {
 
 }
 
+java {
+	toolchain.languageVersion.set(JavaLanguageVersion.of(17))
+}
+kotlin {
+	jvmToolchain {
+		languageVersion.set(JavaLanguageVersion.of("17"))
+	}
+}
+
+
 dependencies {
 	// To change the versions see the gradle.properties file
 	minecraft "com.mojang:minecraft:${project.minecraft_version}"