[libxml2] fix typo in comment

[Nick Wellnhofer <nwellnhof src gnome org>]

commit c1632fbd0abdfecbdc8aa2c316f6e2d8cf848a83
Author: Mehltretter Karl <kmehltretter pcs de>
Date:   Fri May 6 10:58:58 2022 +0200

    fix typo in comment

 xmlIO.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/xmlIO.c b/xmlIO.c
index 544a99e3..823a0dda 100644
--- a/xmlIO.c
+++ b/xmlIO.c
@@ -1130,7 +1130,7 @@ xmlGzfileOpen_real (const char *filename) {
  * xmlGzfileOpen:
  * @filename:  the URI for matching
  *
- * Wrapper around xmlGzfileOpen if the open fais, it will
+ * Wrapper around xmlGzfileOpen_real if the open fails, it will
  * try to unescape @filename
  */
 static void *