Additional post-commit fix (bug #30946): server version

in a conditional commentary at the new SELECT ... INTO
OUTFILE ... CHARACTER SET syntax has been updated to 5.1.38.

client/mysqldump.c

@@ -3137,7 +3137,7 @@ static void dump_table(char *table, char *db)
     dynstr_append_checked(&query_string, filename);
     dynstr_append_checked(&query_string, "'");
 
-    dynstr_append_checked(&query_string, " /*!50137 CHARACTER SET ");
+    dynstr_append_checked(&query_string, " /*!50138 CHARACTER SET ");
     dynstr_append_checked(&query_string, default_charset == mysql_universal_client_charset ?
                                          my_charset_bin.name : /* backward compatibility */
                                          default_charset);