runtime(yacc): include yacc ftplugin file

closes: #15173

Signed-off-by: Riley Bruins <ribru17@hotmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/.github/MAINTAINERS b/.github/MAINTAINERS
index 40e8ec6..0320e21 100644
--- a/.github/MAINTAINERS
+++ b/.github/MAINTAINERS
@@ -267,6 +267,7 @@
 runtime/ftplugin/xcompose.vim		@ObserverOfTime
 runtime/ftplugin/xml.vim		@chrisbra
 runtime/ftplugin/xs.vim			@petdance
+runtime/ftplugin/yacc.vim		@ribru17
 runtime/ftplugin/zsh.vim		@chrisbra
 runtime/import/dist/vimhighlight.vim	@lacygoill
 runtime/indent/arduino.vim		@k-takata