[LyX/master] Update link

[Juergen Spitzmueller]

commit e40fe3a15d7cc93d664c66ffb74ff2ecf20f8c1a
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Sun May 3 09:13:59 2020 +0200

    Update link
---
 lib/ui/stdmenus.inc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/lib/ui/stdmenus.inc b/lib/ui/stdmenus.inc
index 2b4277b..be4274b 100644
--- a/lib/ui/stdmenus.inc
+++ b/lib/ui/stdmenus.inc
@@ -19,7 +19,7 @@
 # * Conjunctions: and, but, for, not, so, yet ...
 # * Prepositions of three or fewer letters: at, for, by, in, to ...
 #   (except when the preposition is part of a verb phrase, such as "Check In")
-# (http://library.gnome.org/devel/hig-book/stable/design-text-labels.html.en)
+# (https://developer.gnome.org/hig-book/unstable/design-text-labels.html.en)
 
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