patch 9.1.0000: Vim 9.1 release

Problem:  Need a new release
Solution: Release Vim 9.1

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/version6.txt b/runtime/doc/version6.txt
index e14e158..f4d2a98 100644
--- a/runtime/doc/version6.txt
+++ b/runtime/doc/version6.txt
@@ -1,4 +1,4 @@
-*version6.txt*  For Vim version 9.0.  Last change: 2022 Apr 06
+*version6.txt*  For Vim version 9.1.  Last change: 2022 Apr 06
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar