v0.81.3

What's Changed

• [client] Bound the Signal stream registration wait and track its state based on stream health (#8175) by @riccardomanfrin in #8254
• [client,relay] Bump quic-go to v0.64.0 (#8249) by @riccardomanfrin in #8253

Full Changelog: v0.81.2...v0.81.3