Bump core from d1bcbf2 to 6227751 (#1822)

Bumps [core](https://github.com/microsoft/typespec) from `d1bcbf2` to
`6227751`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/microsoft/typespec/commit/62277511dfc86592da8dd656ddef550befec680b"><code>6227751</code></a>
[Python] Update dependencies to fix install (<a
href="https://redirect.github.com/microsoft/typespec/issues/5005">#5005</a>)</li>
<li><a
href="https://github.com/microsoft/typespec/commit/a20cde15606398a52685dbca8417d9172fc3f579"><code>a20cde1</code></a>
Fix to property setters (<a
href="https://redirect.github.com/microsoft/typespec/issues/5002">#5002</a>)</li>
<li><a
href="https://github.com/microsoft/typespec/commit/86f02c6e91ff99fad2cf1162496a5a823e72b9a1"><code>86f02c6</code></a>
Replace AsExpression and explicit casting with extension methods (<a
href="https://redirect.github.com/microsoft/typespec/issues/4940">#4940</a>)</li>
<li><a
href="https://github.com/microsoft/typespec/commit/e984e7494fcd852504e6a52852eb69eac15d368f"><code>e984e74</code></a>
Don't include property setter for input-only model properties (<a
href="https://redirect.github.com/microsoft/typespec/issues/4997">#4997</a>)</li>
<li><a
href="https://github.com/microsoft/typespec/commit/72e5c09a306da55a7e19a248beef6413687d25e1"><code>72e5c09</code></a>
Bump happy-dom from 15.7.4 to 15.10.2 (<a
href="https://redirect.github.com/microsoft/typespec/issues/4992">#4992</a>)</li>
<li><a
href="https://github.com/microsoft/typespec/commit/163912b68a5fd8ca0d91ef06058828fbd3e840aa"><code>163912b</code></a>
fix incorrect config schema in Docs
(<code>TypeSpecProjectSchema.output-dir</code>) (<a
href="https://redirect.github.com/microsoft/typespec/issues/4965">#4965</a>)</li>
<li><a
href="https://github.com/microsoft/typespec/commit/ad3a7a1359d23bc28b44c3a1945c700b91e78a70"><code>ad3a7a1</code></a>
New version banner that shows up for 7 days after the release (<a
href="https://redirect.github.com/microsoft/typespec/issues/4984">#4984</a>)</li>
<li><a
href="https://github.com/microsoft/typespec/commit/aa531cfafced44988828865e39ffa8f1adc9943f"><code>aa531cf</code></a>
[http-client-csharp] fix: generate deserialization switch for nested
discrimi...</li>
<li>See full diff in <a
href="https://github.com/microsoft/typespec/compare/d1bcbf2240d87aa1984b17e89ce3ed243f560777...62277511dfc86592da8dd656ddef550befec680b">compare
view</a></li>
</ul>
</details>
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