[LyX/master] supported-languages: update info on font subs

[Scott Kostyshak]

commit ccd88246a94e66552882bfe6fc5e047f2501f89f
Author: Scott Kostyshak <skostysh at lyx.org>
Date:   Fri Aug 18 11:24:34 2023 -0400

    supported-languages: update info on font subs
    
    Consistent with 008e1cc9.
---
 .../export/latex/languages/supported-languages.lyx |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/autotests/export/latex/languages/supported-languages.lyx b/autotests/export/latex/languages/supported-languages.lyx
index b099da2..0130643 100644
--- a/autotests/export/latex/languages/supported-languages.lyx
+++ b/autotests/export/latex/languages/supported-languages.lyx
@@ -6006,13 +6006,14 @@ usepackage{fonts-tlwg}}
 \end_layout
 
 \begin_layout Standard
-or set up the font substitutes with the 
+or set up the font substitutes with 
+\backslash
+DeclareFontFamilySubstitution (if you have a LaTeX kernel older than February 2020,
+ you can use the now-deprecated 
 \emph on
 substitutefont 
 \emph default
-package
-\emph on
-.
+package).
 \end_layout
 
 \end_deeper