Update codecs/h264 owners.

- Removed hbos@webrtc.org
- Added ssilkin@webrtc.org

Bug: none
Change-Id: I520be843cbb28652393cb0e0e05d7e0c1786e562
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/131125
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Sergey Silkin <ssilkin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27447}
diff --git a/modules/video_coding/codecs/h264/OWNERS b/modules/video_coding/codecs/h264/OWNERS
index a79fd4a..4b06c4e 100644
--- a/modules/video_coding/codecs/h264/OWNERS
+++ b/modules/video_coding/codecs/h264/OWNERS
@@ -1,2 +1,2 @@
-hbos@webrtc.org
 sprang@webrtc.org
+ssilkin@webrtc.org