Commit: runtime(doc): update termguicolors default description

[Christian Brabandt]

runtime(doc): update termguicolors default description

Commit: https://github.com/vim/vim/commit/dc725a04fa739cdeccb8dd7489046b27e0fdec31
Author: Christian Brabandt <c...@256bit.org>
Date: Sat Aug 23 19:46:49 2025 +0200

runtime(doc): update termguicolors default description

related: https://github.com/vim/vim/issues/18087

Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index dab6fe0fe..8dba6f43b 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -8887,8 +8887,7 @@ A jump table for the options with a short description can be found at |Q_op|.
< You need to do this when your system has no locale support for UTF-8.

*'termguicolors'* *'tgc'* *'notermguicolors'* *'notgc'* *E954*
-'termguicolors' 'tgc' boolean (default off unless Vim detects that it runs
- in a capable terminal)
+'termguicolors' 'tgc' boolean (default off)
global
{not available when compiled without the
|+termguicolors| feature}