[SYCL] fix syntax

Author: dklochkov-emb

clang/include/clang/Basic/DiagnosticSemaKinds.td

@@ -12970,7 +12970,7 @@ def err_free_function_first_occurrence_missing_attr: Error<
 def err_free_function_class_method : Error<
   "%select{static |}0class method cannot be used to define a SYCL kernel free function kernel">;
 def err_free_function_virtual_arg : Error<
-"argument type %0 of kernel free function can not %select{be virtually derived |have virtual methods}1">;
+  "argument type %0 of kernel free function can not %select{be virtually derived |have virtual methods}1">;
 
 
 // SYCL kernel entry point diagnostics