RM_ReplyWithCString was missing registration

(cherry picked from commit 0a97149d)

src/module.c

@@ -5337,6 +5337,7 @@ void moduleRegisterCoreAPI(void) {
     REGISTER_API(ReplySetArrayLength);
     REGISTER_API(ReplyWithString);
     REGISTER_API(ReplyWithStringBuffer);
+    REGISTER_API(ReplyWithCString);
     REGISTER_API(ReplyWithNull);
     REGISTER_API(ReplyWithCallReply);
     REGISTER_API(ReplyWithDouble);