Bump snowflake/go-webrtc again for trac 21312
This is a followup to #25449 (moved).
We discovered additional crashes having to do with the go-webrtc binding in #21312 (moved). Although we only saw the crashes in the proxy and server components, not the client, the attached patch applies the same synchronization fixes to the client.
I did a
testbuild and put the results here (I'm using it right now to file this ticket):