[LyX/master] Add note about CopyStyle

[Richard Kimberly Heck]

commit 8e190c09f271bf6e0d66f7d1bc6d40fc60a8d4f7
Author: Richard Kimberly Heck <rikiheck at lyx.org>
Date:   Tue Mar 14 11:50:06 2023 -0400

    Add note about CopyStyle
---
 lib/doc/Customization.lyx |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/lib/doc/Customization.lyx b/lib/doc/Customization.lyx
index e076ca0..92de9c8 100644
--- a/lib/doc/Customization.lyx
+++ b/lib/doc/Customization.lyx
@@ -14698,7 +14698,11 @@ string
 \end_inset
 
 ] Copies all the features of an existing style into the current one.
-\change_inserted 1075283030 1671679774
+
+\change_inserted -584632292 1678808972
+ Note that this copies the style as it is defined at that point.
+ Later changes to it will not affect styles into which it has been copied.
+\change_unchanged
 
 \end_layout