Commit: patch 9.1.1578: configure: comment still mentions autoconf 2.71

[Christian Brabandt]

patch 9.1.1578: configure: comment still mentions autoconf 2.71

Commit: https://github.com/vim/vim/commit/ad5c9b4b11d2740173573baec7b20dfd2fbb7432
Author: Yee Cheng Chin <ychi...@gmail.com>
Date: Tue Jul 22 17:55:08 2025 +0200

patch 9.1.1578: configure: comment still mentions autoconf 2.71

Problem: configure: comment still mentions autoconf 2.71 to generate
the configure script
Solution: Update the comment to use autoconf 2.72 instead (Yee Chin Cheng).

Vim v9.1.1369 updated the autoconf generation to be done using 2.72.
Update comments to reflect that.

closes: #17815

Signed-off-by: Yee Cheng Chin <ychi...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/src/configure.ac b/src/configure.ac
index b6d528b15..a4ff405bc 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -1,6 +1,6 @@
dnl configure.ac: autoconf script for Vim

-dnl Process this file with autoconf 2.71 to produce "configure".
+dnl Process this file with autoconf 2.72 to produce "configure".

AC_INIT
AC_CONFIG_SRCDIR([vim.h])
diff --git a/src/version.c b/src/version.c
index 753be3bcc..c016cf4ff 100644
--- a/src/version.c
+++ b/src/version.c
@@ -719,6 +719,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 1578,
/**/
1577,
/**/