[CODEOWNERS] Add recipe autoroller bot

Bug: https://github.com/flutter/flutter/issues/93225
Change-Id: If568497c5d936bf59c799d1ff99ea76afa64abb9
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/23761
Reviewed-by: Godofredo Contreras <godofredoc@google.com>
Reviewed-by: Christopher Fujino <fujino@google.com>
Commit-Queue: Casey Hillers <chillers@google.com>
diff --git a/OWNERS b/OWNERS
index bb6991a..a40ff32 100644
--- a/OWNERS
+++ b/OWNERS
@@ -6,3 +6,5 @@
 godofredoc@google.com
 keyonghan@google.com
 mohsinally@google.com
+
+per-file infra/config/recipes.cfg=flutter-prod-builder@chops-service-accounts.iam.gserviceaccount.com