• Fixes ConnectionCommon::complete_io() to flush writers before potentially expecting a response.
• Upgrades *ring* to 0.17 - Note: *ring* 0.17 when built with gcc will experience slower X25519 and Ed25519 operations compared to previous releases.
• Upgrades rustls-webpki to 0.101.7 to match *ring* 0.17 dependency
• Tls12CipherSuite::hash_algorithm() and Tls13CipherSuite::hash_algorithm() are now crate-internal. This is a small breaking change to remove unintended exposure of underlying *ring* types in the public API.

What's Changed

• fuzz: remove unused webpki dependency by @ctz in https://github.com/rustls/rustls/pull/1523
• Fix nightly clippy warning by @djc in https://github.com/rustls/rustls/pull/1443
• Upgrade to ring 0.17 by @djc in https://github.com/rustls/rustls/pull/1508
• Bump MSRV to 1.61 by @djc in https://github.com/rustls/rustls/pull/1516
• docs: adjust ring platform compatibility by @cpu in https://github.com/rustls/rustls/pull/1532
• Fix: flush writers before potentially expecting a response by @robsdedude in https://github.com/rustls/rustls/pull/1542
• v0.21.8 preparation by @cpu in https://github.com/rustls/rustls/pull/1525

Full Changelog: https://github.com/rustls/rustls/compare/v/0.21.7...v/0.21.8