Fix WebRTC version updater bot.

Bug: webrtc:13373
Change-Id: If6e1cf9d6e62284b3ca496199b3bba5b8248302d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/238561
Auto-Submit: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Björn Terelius <terelius@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35397}
diff --git a/call/OWNERS b/call/OWNERS
index f863b93..48b403d 100644
--- a/call/OWNERS
+++ b/call/OWNERS
@@ -3,3 +3,5 @@
 srte@webrtc.org
 terelius@webrtc.org
 sprang@webrtc.org
+
+per-file version.cc=webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com