Bump serde from 1.0.193 to 1.0.195 in /cmd/pinniped-proxy (#7284)

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.193 to
1.0.195.
<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>v1.0.195</h2>
<ul>
<li>Prevent remote definitions of tuple struct or tuple variant from
triggering dead_code warning (<a
href="https://redirect.github.com/serde-rs/serde/issues/2671">#2671</a>)</li>
</ul>
<h2>v1.0.194</h2>
<ul>
<li>Update proc-macro2 to fix caching issue when using a rustc-wrapper
such as sccache</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/serde-rs/serde/commit/03eec42c3313b36da416be1486e9ecac345784d5"><code>03eec42</code></a>
Release 1.0.195</li>
<li><a
href="https://github.com/serde-rs/serde/commit/196f311ae2fd8ad94fe38a57830419859a4d3dbb"><code>196f311</code></a>
Merge pull request <a
href="https://redirect.github.com/serde-rs/serde/issues/2671">#2671</a>
from dtolnay/deadremote</li>
<li><a
href="https://github.com/serde-rs/serde/commit/38d9e0b2091e9b6150486c2c37367819b86bcc39"><code>38d9e0b</code></a>
Revert &quot;Add FIXME to fix dead_code warning when using
serde(remote)&quot;</li>
<li><a
href="https://github.com/serde-rs/serde/commit/6502b3131697eff6420786ad71f87f29cfff3a13"><code>6502b31</code></a>
Fix new dead_code warning in tuple struct and tuple variant remote
defs</li>
<li><a
href="https://github.com/serde-rs/serde/commit/6f1a8c3115c8d2502178c25d610fbaee2e82c46b"><code>6f1a8c3</code></a>
Add FIXME to fix dead_code warning when using serde(remote)</li>
<li><a
href="https://github.com/serde-rs/serde/commit/d883c94cc9fe72d0512dc7f4def7191a401595c9"><code>d883c94</code></a>
Work around dead_code warning in tests</li>
<li><a
href="https://github.com/serde-rs/serde/commit/961fa59a7469c5b5e323b9723323df412048d60d"><code>961fa59</code></a>
Merge pull request <a
href="https://redirect.github.com/serde-rs/serde/issues/2670">#2670</a>
from serde-rs/exhaustive</li>
<li><a
href="https://github.com/serde-rs/serde/commit/8bc71def551df190e6817d3311e5c76f751f53e6"><code>8bc71de</code></a>
Fill in omitted patterns for GenericArguments match</li>
<li><a
href="https://github.com/serde-rs/serde/commit/7c65a9dc0eab2d4d829b258a7b3549351bbe8dcd"><code>7c65a9d</code></a>
Pick up changes to non_exhaustive_omitted_patterns lint</li>
<li><a
href="https://github.com/serde-rs/serde/commit/d2d977a6c6dcff237ae956336d18b0c900c61aad"><code>d2d977a</code></a>
Release 1.0.194</li>
<li>Additional commits viewable in <a
href="https://github.com/serde-rs/serde/compare/v1.0.193...v1.0.195">compare
view</a></li>
</ul>
</details>
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