patch 9.1.0901: MS-Windows: vimtutor batch script can be improved

Problem:  MS-Windows: vimtutor batch script can be improved
Solution: Update vimtutor.bat, validate languages using Powershell
          cultureinfo (RestorerZ)

closes: #16112

Signed-off-by: RestorerZ <restorer@mail2k.ru>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 6703606..724fa61 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    901,
+/**/
     900,
 /**/
     899,