chore(deps): Bump proc-macro2 from 1.0.60 to 1.0.63 (vectordotdev#17757)

Bumps [proc-macro2](https://github.com/dtolnay/proc-macro2) from 1.0.60
to 1.0.63.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/proc-macro2/releases">proc-macro2's
releases</a>.</em></p>
<blockquote>
<h2>1.0.63</h2>
<ul>
<li>Parse <code>c&quot;…&quot;</code> c-string literals (tracking issue:
<a
href="https://redirect.github.com/rust-lang/rust/issues/105723">rust-lang/rust#105723</a>)</li>
</ul>
<h2>1.0.62</h2>
<p><em>yanked</em></p>
<h2>1.0.61</h2>
<ul>
<li>Stricter parsing of whitespace in cooked string literals and between
tokens (<a
href="https://redirect.github.com/dtolnay/proc-macro2/issues/392">#392</a>,
<a
href="https://redirect.github.com/dtolnay/proc-macro2/issues/393">#393</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/proc-macro2/commit/10f5dc398329d35a266b40f096671e2c278a633f"><code>10f5dc3</code></a>
Release 1.0.63</li>
<li><a
href="https://github.com/dtolnay/proc-macro2/commit/4207faab09300ed7a2c91638cae787b967ff6442"><code>4207faa</code></a>
Fix overflow in delimiter_of_raw_string at end of input</li>
<li><a
href="https://github.com/dtolnay/proc-macro2/commit/cfa1524b7f8e67a5d9b1668a9bbbeead9223682b"><code>cfa1524</code></a>
Release 1.0.62</li>
<li><a
href="https://github.com/dtolnay/proc-macro2/commit/233125963321723a99b02ee65a565797bdc13cd0"><code>2331259</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/proc-macro2/issues/396">#396</a>
from dtolnay/trailingbackslash</li>
<li><a
href="https://github.com/dtolnay/proc-macro2/commit/aebe7a0e7bbc9876fbce41f7e72112ca7f6f3f8e"><code>aebe7a0</code></a>
Eliminate unneeded peekability on cooked string iterators</li>
<li><a
href="https://github.com/dtolnay/proc-macro2/commit/e2923c3cab72914cb259186d31c680d107f0b013"><code>e2923c3</code></a>
Factor out logic for processing trailing backslashes</li>
<li><a
href="https://github.com/dtolnay/proc-macro2/commit/07ffd046a7ad8043ed3ebec81560b2cc2ffcfce1"><code>07ffd04</code></a>
Convert cooked_byte_string trailing backslash logic to bytes</li>
<li><a
href="https://github.com/dtolnay/proc-macro2/commit/231e8c8c1258bd1df6377debca57b476345c9a2d"><code>231e8c8</code></a>
Return Result from \x parser</li>
<li><a
href="https://github.com/dtolnay/proc-macro2/commit/3f6d84bf850ef1258fea89229e527c03bab8d6b7"><code>3f6d84b</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/proc-macro2/issues/395">#395</a>
from dtolnay/cstr</li>
<li><a
href="https://github.com/dtolnay/proc-macro2/commit/96c97e503e2ece809bb66c47fef392ddd19e402c"><code>96c97e5</code></a>
Implement c-str literal parsing</li>
<li>Additional commits viewable in <a
href="https://github.com/dtolnay/proc-macro2/compare/1.0.60...1.0.63">compare
view</a></li>
</ul>
</details>
<br />


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