patch 9.1.0105: Style: typos found

Problem:  Style: typos found
Solution: correct them
          (zeertzjq)

closes: #14023

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_visual.vim b/src/testdir/test_visual.vim
index 066d7eb..17f0fd0 100644
--- a/src/testdir/test_visual.vim
+++ b/src/testdir/test_visual.vim
@@ -1008,7 +1008,7 @@
 " Test for changing case
 func Test_visual_change_case()
   new
-  " gUe must uppercase a whole word, also when ß changes to SS
+  " gUe must uppercase a whole word, also when ß changes to ẞ
   exe "normal Gothe youtußeuu end\<Esc>Ypk0wgUe\r"
   " gUfx must uppercase until x, inclusive.
   exe "normal O- youßtußexu -\<Esc>0fogUfx\r"