Replace missing property from GradleConstants

idea/idea-gradle/src/org/jetbrains/kotlin/idea/core/script/GradleScriptTemplateProvider.kt

diff --git a/idea/idea-gradle/src/org/jetbrains/kotlin/idea/core/script/GradleScriptTemplateProvider.kt b/idea/idea-gradle/src/org/jetbrains/kotlin/idea/core/script/GradleScriptTemplateProvider.kt
index 96afa51..a10dfda 100644
--- a/idea/idea-gradle/src/org/jetbrains/kotlin/idea/core/script/GradleScriptTemplateProvider.kt
+++ b/idea/idea-gradle/src/org/jetbrains/kotlin/idea/core/script/GradleScriptTemplateProvider.kt
@@ -236,10 +236,10 @@
         override val dependencyResolver: DependenciesResolver = ErrorScriptDependenciesResolver(message)
 
         override fun getScriptName(script: KtScript) =
-            Name.identifier(script.containingKtFile.name.removeSuffix(GradleConstants.KOTLIN_DSL_SCRIPT_EXTENSION))
+            Name.identifier(script.containingKtFile.name.removeSuffix(".gradle.kts"))
 
         override fun isScript(fileName: String): Boolean =
-            fileName.endsWith(GradleConstants.KOTLIN_DSL_SCRIPT_EXTENSION)
+            fileName.endsWith(".gradle.kts")
     }
 
     private class ErrorScriptDependenciesResolver(private val message: String? = null) : DependenciesResolver {