Bump tests/perf/s2n-quic from c6e694e to b1b5bf8 (#4164)

Bumps [tests/perf/s2n-quic](https://github.com/aws/s2n-quic) from
`c6e694e` to `b1b5bf8`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/aws/s2n-quic/commit/b1b5bf8bee2e3998cf5a7bf9a90bb3b96b57cd37"><code>b1b5bf8</code></a>
build(deps): revert update of prost requirement from 0.13 to 0.14 (<a
href="https://redirect.github.com/aws/s2n-quic/issues/2671">#2671</a>)</li>
<li><a
href="https://github.com/aws/s2n-quic/commit/f84b71ad5526650b7293c523b191e47db3de93e0"><code>f84b71a</code></a>
feat(s2n-quic-dc): Increase background handshake jitter (<a
href="https://redirect.github.com/aws/s2n-quic/issues/2670">#2670</a>)</li>
<li>See full diff in <a
href="https://github.com/aws/s2n-quic/compare/c6e694e99cc4e81d1863b8b3bb5a23311f24e40f...b1b5bf8bee2e3998cf5a7bf9a90bb3b96b57cd37">compare
view</a></li>
</ul>
</details>
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