Add ML completion jar to the resulting plugin jar

- Without it, ML completion jar will not be present in the runtime, causing errors when ML completion is enabled
- This step should have been done in 28ec74648e commit

prepare/idea-plugin/build.gradle.kts

@@ -142,6 +142,10 @@ dependencies {
 
     libraries(kotlinStdlib("jdk8"))
 
+    Platform[193].orHigher {
+        libraries(commonDep("org.jetbrains.intellij.deps.completion", "completion-ranking-kotlin"))
+    }
+
     libraryProjects.forEach {
         libraries(project(it)) { isTransitive = false }
     }