build(deps): bump protobuf from 5.28.0 to 5.28.1 (#91)

Bumps [protobuf](https://github.com/protocolbuffers/protobuf) from
5.28.0 to 5.28.1.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/protocolbuffers/protobuf/commit/10ef3f77683f77fb3c059bf47725c27b3ff41e63"><code>10ef3f7</code></a>
Updating version.json and repo version numbers to: 28.1</li>
<li><a
href="https://github.com/protocolbuffers/protobuf/commit/d70f0778879317c2416ca414f6ba3261962622be"><code>d70f077</code></a>
Merge pull request <a
href="https://redirect.github.com/protocolbuffers/protobuf/issues/18191">#18191</a>
from protocolbuffers/cp-ruby-upb</li>
<li><a
href="https://github.com/protocolbuffers/protobuf/commit/60e585c8f451cafcf6fd00a6575d7f2be09904d1"><code>60e585c</code></a>
Update staleness</li>
<li><a
href="https://github.com/protocolbuffers/protobuf/commit/70b77de0d5aa8f70f87244961dc8fae2b1c9b928"><code>70b77de</code></a>
Fix a potential Ruby-upb use of uninitialized memory.</li>
<li><a
href="https://github.com/protocolbuffers/protobuf/commit/5b4b3af7f1238c35e491446f9e8c324ef4337cfc"><code>5b4b3af</code></a>
Merge pull request <a
href="https://redirect.github.com/protocolbuffers/protobuf/issues/18188">#18188</a>
from acozzette/28-fix</li>
<li><a
href="https://github.com/protocolbuffers/protobuf/commit/8ea3bb17cbf7f19922f5d0443b8dd9080c596ea1"><code>8ea3bb1</code></a>
Fix compiler error with <code>StrongReferenceToType()</code></li>
<li><a
href="https://github.com/protocolbuffers/protobuf/commit/9deedf0304c6ed8c7fb1cdb4466f01b8253cf376"><code>9deedf0</code></a>
upb: fix uninitialized upb_MessageValue buffer bugs (<a
href="https://redirect.github.com/protocolbuffers/protobuf/issues/18160">#18160</a>)</li>
<li><a
href="https://github.com/protocolbuffers/protobuf/commit/3454ed8adcff4313bcaaa2301165617eb1de5616"><code>3454ed8</code></a>
Merge pull request <a
href="https://redirect.github.com/protocolbuffers/protobuf/issues/18013">#18013</a>
from protocolbuffers/28.x-202408281753</li>
<li><a
href="https://github.com/protocolbuffers/protobuf/commit/976ab4188131c4fc9a9adfebea3ba9bc05459543"><code>976ab41</code></a>
Updating version.json and repo version numbers to: 28.1-dev</li>
<li>See full diff in <a
href="https://github.com/protocolbuffers/protobuf/compare/v5.28.0...v5.28.1">compare
view</a></li>
</ul>
</details>
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