The bridge parameters are too long (535 bytes) to fit in space available for encoding them (510 bytes). This change removes one of the STUN servers,
stun:stun.voip.blackberry.com:3478, to reduce the length to 500 bytes.
stun:stun.voip.blackberry.com:3478 was chosen because, besides being a relatively long string in itself, it's known to be blocked (on the Unified Register) in Russia: https://lists.torproject.org/pipermail/anti-censorship-team/2022-May/000237.html
Fixes #40665 (closed)