Rearrange api/OWNERS to show who's backup OWNERS

tkchin and deadbeef are not working on webrtc on a daily basis at the
moment, so non-urgent approvals should not go to them.

Not mentioning this has led to misunderstandings.

Bug: chromium:1371843
Change-Id: I91e99249d32e52d6083de9c2b1bfebfc4693acac
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/278201
Reviewed-by: Taylor Brandstetter <deadbeef@google.com>
Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38314}
diff --git a/api/OWNERS b/api/OWNERS
index 7ae7d81..383ac8a 100644
--- a/api/OWNERS
+++ b/api/OWNERS
@@ -1,10 +1,12 @@
-deadbeef@webrtc.org
 hta@webrtc.org
 magjed@webrtc.org
 perkj@webrtc.org
-tkchin@webrtc.org
 tommi@webrtc.org
 
+# For approvals that absolutely must be done on US Pacific time
+deadbeef@webrtc.org
+tkchin@webrtc.org
+
 per-file peer_connection*=hbos@webrtc.org
 
 per-file DEPS=mbonadei@webrtc.org