Update obsolete reference to plpgsql's gram.y file.

tglsfdc · tglsfdc · commit 98b1efd6ef6a · 2024-12-30T14:33:45.000-05:00
This was evidently missed in 05346c1, which renamed that file to pl_gram.y. Japin Li Discussion: https://postgr.es/m/ME0P300MB0445F7CA7456C2AC67D37A01B6092@ME0P300MB0445.AUSP300.PROD.OUTLOOK.COM
diff --git a/src/pl/plpgsql/src/plpgsql.h b/src/pl/plpgsql/src/plpgsql.h
@@ -1333,7 +1333,7 @@ extern void plpgsql_scanner_init(const char *str);
 extern void plpgsql_scanner_finish(void);
 
 /*
- * Externs in gram.y
+ * Externs in pl_gram.y
  */
 extern int	plpgsql_yyparse(void);
 
