runtime(ant): Update syntax file (#13926)

Remove invalid display option from syn-keyword commands.

Take over maintenance of this file.

Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index cbf9b02..45c8d33 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -342,6 +342,7 @@
 runtime/syntax/abaqus.vim		@costerwi
 runtime/syntax/aidl.vim			@dpelle
 runtime/syntax/amiga.vim		@cecamp
+runtime/syntax/ant.vim			@dkearns
 runtime/syntax/arduino.vim		@johshoff
 runtime/syntax/asciidoc.vim		@aerostitch
 runtime/syntax/asm.vim			@dkearns