Bump serde from 1.0.183 to 1.0.185 in /cmd/pinniped-proxy (#6670)

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.183 to
1.0.185.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/serde-rs/serde/releases">serde's
releases</a>.</em></p>
<blockquote>
<h2>v1.0.185</h2>
<ul>
<li>Fix error <em>&quot;cannot move out of <code>*self</code> which is
behind a shared reference&quot;</em> deriving Serialize on a
non_exhaustive enum (<a
href="https://redirect.github.com/serde-rs/serde/issues/2591">#2591</a>)</li>
</ul>
<h2>v1.0.184</h2>
<ul>
<li>Restore from-source <code>serde_derive</code> build on all platforms
— eventually we'd like to use a first-class precompiled macro if such a
thing becomes supported by cargo / crates.io</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/serde-rs/serde/commit/3c7dd6fc1e6f83e79e225670aac114656694f198"><code>3c7dd6f</code></a>
Release 1.0.185</li>
<li><a
href="https://github.com/serde-rs/serde/commit/8b196ea1c86e5846b0071ddf1e686d6eaefbdc37"><code>8b196ea</code></a>
Merge pull request <a
href="https://redirect.github.com/serde-rs/serde/issues/2592">#2592</a>
from dtolnay/remotenonexhaustive</li>
<li><a
href="https://github.com/serde-rs/serde/commit/1f8c8ad5a3c70782ddfd1c219227bac3b139d15d"><code>1f8c8ad</code></a>
Fix &quot;cannot move out of <code>*self</code> which is behind a shared
reference&quot;</li>
<li><a
href="https://github.com/serde-rs/serde/commit/870925d503e208606b947d4e359d9723d0bde8da"><code>870925d</code></a>
Add repro of issue 2591</li>
<li><a
href="https://github.com/serde-rs/serde/commit/d593215ef703d1fe343b62b00e21880dfe501007"><code>d593215</code></a>
No need for slow macOS CI if there is no platform-specific code</li>
<li><a
href="https://github.com/serde-rs/serde/commit/110af31b48c86084721885930065da7d47654ca0"><code>110af31</code></a>
Merge pull request <a
href="https://redirect.github.com/serde-rs/serde/issues/2590">#2590</a>
from pinkforest/phase-out-precompiled</li>
<li><a
href="https://github.com/serde-rs/serde/commit/360606b9a63ba4e594dc20ddf0e20228b60b34cb"><code>360606b</code></a>
Following consensus on: <a
href="https://redirect.github.com/serde-rs/serde/issues/2580">#2580</a>
(review)</li>
<li><a
href="https://github.com/serde-rs/serde/commit/151b45ae361a08d24d8595e0800477870657bfb4"><code>151b45a</code></a>
Release 1.0.184</li>
<li><a
href="https://github.com/serde-rs/serde/commit/4617c957b968084f21357fb405bd9383be05e337"><code>4617c95</code></a>
Merge pull request <a
href="https://redirect.github.com/serde-rs/serde/issues/2587">#2587</a>
from wucke13/master</li>
<li><a
href="https://github.com/serde-rs/serde/commit/2547ed83ca8fcfb9f97f46b964c986954dd95bc6"><code>2547ed8</code></a>
fix shebang in build.sh</li>
<li>Additional commits viewable in <a
href="https://github.com/serde-rs/serde/compare/v1.0.183...v1.0.185">compare
view</a></li>
</ul>
</details>
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