Update runtime files.
diff --git a/runtime/syntax/debsources.vim b/runtime/syntax/debsources.vim
index 9b75797..69900c7 100644
--- a/runtime/syntax/debsources.vim
+++ b/runtime/syntax/debsources.vim
@@ -2,8 +2,8 @@
" Language: Debian sources.list
" Maintainer: Debian Vim Maintainers
" Former Maintainer: Matthijs Mohlmann <matthijs@cacholong.nl>
-" Last Change: 2022 Oct 29
-" URL: https://salsa.debian.org/vim-team/vim-debian/blob/master/syntax/debsources.vim
+" Last Change: 2023 Jan 16
+" URL: https://salsa.debian.org/vim-team/vim-debian/blob/main/syntax/debsources.vim
" Standard syntax initialization
if exists('b:current_syntax')
@@ -14,7 +14,7 @@
syn case match
" A bunch of useful keywords
-syn match debsourcesKeyword /\(deb-src\|deb\|main\|contrib\|non-free\|restricted\|universe\|multiverse\)/
+syn match debsourcesKeyword /\(deb-src\|deb\|main\|contrib\|non-free\|non-free-firmware\|restricted\|universe\|multiverse\)/
" Match comments
syn match debsourcesComment /#.*/ contains=@Spell