Codeowners: add KBelabas for runtime/syntax/gp.vim (#12898)


Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 213b9af..d8130ce 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -384,6 +384,7 @@
 runtime/syntax/gitrebase.vim		@tpope
 runtime/syntax/go.vim			@bhcleek
 runtime/syntax/godoc.vim		@dbarnett
+runtime/syntax/gp.vim			@KBelabas
 runtime/syntax/gprof.vim		@dpelle
 runtime/syntax/groff.vim		@jmarshall
 runtime/syntax/gyp.vim			@ObserverOfTime