Auto merge of #28820 - servo:dependabot/cargo/xml-rs-0.8.4, r=jdm

Bump xml-rs from 0.8.3 to 0.8.4

Bumps [xml-rs](https://github.com/netvl/xml-rs) from 0.8.3 to 0.8.4.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/netvl/xml-rs/blob/master/Changelog.md">xml-rs's changelog</a>.</em></p>
<blockquote>
<h2>Version 0.8.4</h2>
<ul>
<li>Fixed recognition of <code>?&gt;</code>, <code>]]&gt;</code> and <code>/&gt;</code> tokens as characters.</li>
<li>Fixed writer output operations to use <code>write_all</code> to ensure that the data
is written fully.</li>
<li>The document declaration is now written before any characters automatically.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="9c82a76645"><code>9c82a76</code></a> Updated manifest and changelog</li>
<li><a href="fa0b431c72"><code>fa0b431</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/netvl/xml-rs/issues/201">#201</a> from crapStone/fix-typo</li>
<li><a href="773ddb97ec"><code>773ddb9</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/netvl/xml-rs/issues/195">#195</a> from jdalberg/parsefix</li>
<li><a href="8ab3284dad"><code>8ab3284</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/netvl/xml-rs/issues/206">#206</a> from brackleian/master</li>
<li><a href="707a7d87d6"><code>707a7d8</code></a> Merge pull request <a href="https://github-redirect.dependabot.com/netvl/xml-rs/issues/205">#205</a> from ATiltedTree/fix-partial-writes</li>
<li><a href="1d4992f189"><code>1d4992f</code></a> Force XML document declaration to be output before characters</li>
<li><a href="4feadca275"><code>4feadca</code></a> fix: Make sure all bytes are written to the writer</li>
<li><a href="05c46aeca3"><code>05c46ae</code></a> fixed typo in docstring</li>
<li><a href="b9f16e2ea7"><code>b9f16e2</code></a> Added Token::EmptyTagEnd to the contains_char_data</li>
<li><a href="9b66b10f18"><code>9b66b10</code></a> Attempted to fix the parsing as characters of ]]&gt; and ?&gt;</li>
<li>See full diff in <a href="https://github.com/netvl/xml-rs/compare/0.8.3...0.8.4">compare view</a></li>
</ul>
</details>
<br />

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=xml-rs&package-manager=cargo&previous-version=0.8.3&new-version=0.8.4)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

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 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>

Cargo.lock

@@ -7627,9 +7627,9 @@ checksum = "12ea8eda4b1eb72f02d148402e23832d56a33f55d8c1b2d5bcdde91d79d47cb1"
 
 [[package]]
 name = "xml-rs"
-version = "0.8.3"
+version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b07db065a5cf61a7e4ba64f29e67db906fb1787316516c4e6e5ff0fea1efcd8a"
+checksum = "d2d7d3948613f75c98fd9328cfdcc45acc4d360655289d0a7d4ec931392200a3"
 
 [[package]]
 name = "xml5ever"