Bump core from d3a4454 to 63dce6b (#763)

Bumps [core](https://github.com/microsoft/typespec) from `d3a4454` to
`63dce6b`.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/microsoft/typespec/commit/63dce6b8a5ec2b25b203f52f4fe376f352ea51f4"><code>63dce6b</code></a>
Fix tooling getting started (<a
href="https://redirect.github.com/microsoft/typespec/issues/3254">#3254</a>)</li>
<li><a
href="https://github.com/microsoft/typespec/commit/4ddf43ae0dffb11cf982bebe006f37d5524bee69"><code>4ddf43a</code></a>
Website: 1ds use v4 (<a
href="https://redirect.github.com/microsoft/typespec/issues/3249">#3249</a>)</li>
<li><a
href="https://github.com/microsoft/typespec/commit/9900b620bb68e15855b354b6efcab4621e4f3f1c"><code>9900b62</code></a>
Fix broken blog link (<a
href="https://redirect.github.com/microsoft/typespec/issues/3252">#3252</a>)</li>
<li><a
href="https://github.com/microsoft/typespec/commit/5757fd16e446fba1d9bed436b6fafd4c4fa6056e"><code>5757fd1</code></a>
Include <code>type</code> in generated extern dec (<a
href="https://redirect.github.com/microsoft/typespec/issues/3250">#3250</a>)</li>
<li>See full diff in <a
href="https://github.com/microsoft/typespec/compare/d3a4454fa0b14be847e49087d36b87a5dc8a8f1c...63dce6b8a5ec2b25b203f52f4fe376f352ea51f4">compare
view</a></li>
</ul>
</details>
<br />


Dependabot will resolve any conflicts with this PR as long as you don't
alter it yourself. You can also trigger a rebase manually by commenting
`@dependabot rebase`.

[//]: # (dependabot-automerge-start)
[//]: # (dependabot-automerge-end)

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits
that have been made to it
- `@dependabot merge` will merge this PR after your CI passes on it
- `@dependabot squash and merge` will squash and merge this PR after
your CI passes on it
- `@dependabot cancel merge` will cancel a previously requested merge
and block automerging
- `@dependabot reopen` will reopen this PR if it is closed
- `@dependabot close` will close this PR and stop Dependabot recreating
it. You can achieve the same result by closing it manually
- `@dependabot show <dependency name> ignore conditions` will show all
of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop
Dependabot creating any more for this major version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop
Dependabot creating any more for this minor version (unless you reopen
the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop
Dependabot creating any more for this dependency (unless you reopen the
PR or upgrade to it yourself)


</details>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>