uid_gflags: fix typo

Thanks, lintian
> I: kamailio: spelling-error-in-binary usr/lib/x86_64-linux-gnu/kamailio/modules/uid_gflags.so successfuly successfully

src/modules/uid_gflags/uid_gflags.c

@@ -361,7 +361,7 @@ int save_gflags(unsigned int flags)
 		return -1;
 	}
 
-	LM_DBG("successfuly stored in database\n");
+	LM_DBG("successfully stored in database\n");
 	return 0;
 }