Fix #KT-26353 'Make variable immutable' is a bad name for a quickfix that changes 'var' to 'val'

idea/src/org/jetbrains/kotlin/idea/quickfix/ChangeVariableMutabilityFix.kt

@@ -36,7 +36,7 @@ class ChangeVariableMutabilityFix(
     private val actionText: String? = null
 ) : KotlinQuickFixAction<KtValVarKeywordOwner>(element) {
 
-    override fun getText() = actionText ?: if (makeVar) "Make variable mutable" else "Make variable immutable"
+    override fun getText() = actionText ?: if (makeVar) "Change to var" else "Change to val"
 
     override fun getFamilyName(): String = text