runtime(doc): vimtutor starts Vim in nocompatible mode

closes: #17593

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/vimtutor.1 b/runtime/doc/vimtutor.1
index 0320b24..14269c0 100644
--- a/runtime/doc/vimtutor.1
+++ b/runtime/doc/vimtutor.1
@@ -29,7 +29,7 @@
 .B Vim
 is always started in
 .B Vi
-compatible mode.
+nocompatible mode.
 .SH OPTIONS
 .TP
 .BR \-l ", " \-\-language\ \fIISO639\fR