[FIR] Consistently use _function_ instead of _functional_ in names of classes and functions

plugins/parcelize/parcelize-compiler/parcelize.k2/src/org/jetbrains/kotlin/parcelize/fir/diagnostics/FirParcelizePropertyChecker.kt

@@ -114,7 +114,7 @@ object FirParcelizePropertyChecker : FirPropertyChecker() {
             type.anySuperTypeConstructor {
                 it is ConeKotlinType &&
                         (it.classId?.asFqNameString() in BuiltinParcelableTypes.PARCELABLE_SUPERTYPE_FQNAMES ||
-                                it.isSomeFunctionalType(session))
+                                it.isSomeFunctionType(session))
             }
         }
     }