update rustls

[hlinnaka]

cargo deny check is complaining about our rustls versions, causing CI to fail:

Problem

error[vulnerability]: `rustls::ConnectionCommon::complete_io` could fall into an infinite loop based on network input
    ┌─ /__w/neon/neon/Cargo.lock:395:1
    │
395 │ rustls 0.21.9 registry+https://github.com/rust-lang/crates.io-index
    │ ------------------------------------------------------------------- security vulnerability detected
    │
    = ID: RUSTSEC-2024-0336
    = Advisory: https://rustsec.org/advisories/RUSTSEC-2024-0336
    = If a `close_notify` alert is received during a handshake, `complete_io`
      does not terminate.

      Callers which do not call `complete_io` are not affected.

      `rustls-tokio` and `rustls-ffi` do not call `complete_io`
      and are not affected.

      `rustls::Stream` and `rustls::StreamOwned` types use
      `complete_io` and are affected.
    = Announcement: https://github.com/rustls/rustls/security/advisories/GHSA-6g7w-8wpp-frhj
    = Solution: Upgrade to >=0.23.5 OR >=0.22.4, <0.23.0 OR >=0.21.11, <0.22.0 (try `cargo update -p rustls`)

error[vulnerability]: `rustls::ConnectionCommon::complete_io` could fall into an infinite loop based on network input
    ┌─ /__w/neon/neon/Cargo.lock:396:1
    │
396 │ rustls 0.22.2 registry+https://github.com/rust-lang/crates.io-index
    │ ------------------------------------------------------------------- security vulnerability detected
    │
    = ID: RUSTSEC-2024-0336
    = Advisory: https://rustsec.org/advisories/RUSTSEC-2024-0336
    = If a `close_notify` alert is received during a handshake, `complete_io`
      does not terminate.

      Callers which do not call `complete_io` are not affected.

      `rustls-tokio` and `rustls-ffi` do not call `complete_io`
      and are not affected.

      `rustls::Stream` and `rustls::StreamOwned` types use
      `complete_io` and are affected.
    = Announcement: https://github.com/rustls/rustls/security/advisories/GHSA-6g7w-8wpp-frhj
    = Solution: Upgrade to >=0.23.5 OR >=0.22.4, <0.23.0 OR >=0.21.11, <0.22.0 (try `cargo update -p rustls`)

Summary of changes

cargo update -p rustls@0.21.9 -p rustls@0.22.2

[github-actions]

2910 tests run: 2793 passed, 0 failed, 117 skipped (full report)

---

Flaky tests (1)

Postgres 16

• test_replication_start: release

Code coverage* (full report)

• functions: 28.1% (6459 of 23019 functions)
• lines: 46.8% (45555 of 97373 lines)

* collected from Rust tests only

---

_{The comment gets automatically updated with the latest test results
8fe2a64 at 2024-04-21T15:54:31.810Z :recycle:}

[hlinnaka]

This was merged as part of PR #7445