Build: Replace kotlin options jvm target 1.8 with java version const

Author: ParaskP7

build.gradle

@@ -105,7 +105,7 @@ allprojects {
 
     tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
         kotlinOptions {
-            jvmTarget = "1.8"
+            jvmTarget = JavaVersion.VERSION_1_8
         }
     }
 }

libs/annotations/build.gradle

@@ -7,6 +7,6 @@ repositories {
 }
 compileKotlin {
     kotlinOptions {
-        jvmTarget = "1.8"
+        jvmTarget = JavaVersion.VERSION_1_8
     }
 }