chore: update pending changelog

Author: rickstaa

CHANGELOG_PENDING.md

@@ -16,6 +16,7 @@
 
 -   [#3355](https://github.com/livepeer/go-livepeer/pull/3355) Allow O/T AI orchs to run without `transcoder` flag.
 -   [#2968](https://github.com/livepeer/go-livepeer/pull/2968) Enhance payment processing log line for better processing by Loki.
+-   [#3362](https://github.com/livepeer/go-livepeer/pull/3362) Add AI service registry log line.
 
 #### Transcoder