Bump syn from 2.0.94 to 2.0.95 (#2597)

Bumps [syn](https://github.com/dtolnay/syn) from 2.0.94 to 2.0.95.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/dtolnay/syn/releases">syn's
releases</a>.</em></p>
<blockquote>
<h2>2.0.95</h2>
<ul>
<li>Fix parenthesization of struct literals in let-chains (<a
href="https://redirect.github.com/dtolnay/syn/issues/1832">#1832</a>)</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/dtolnay/syn/commit/c7b76389008415d7b7634a3265bc8453f994275b"><code>c7b7638</code></a>
Release 2.0.95</li>
<li><a
href="https://github.com/dtolnay/syn/commit/a8096895ab74b7448afc2ddd2ee770a442fde6e4"><code>a809689</code></a>
Merge pull request <a
href="https://redirect.github.com/dtolnay/syn/issues/1832">#1832</a>
from dtolnay/cond</li>
<li><a
href="https://github.com/dtolnay/syn/commit/3f8bac676ef7e81823b6eaaee5217557dee6fa0f"><code>3f8bac6</code></a>
Rewrite condition printing to parenthesize leafs instead of whole
cond</li>
<li><a
href="https://github.com/dtolnay/syn/commit/52699de1b03821953a17090ff29d241ae0ef686d"><code>52699de</code></a>
Print syntax trees in test_fixup failure</li>
<li><a
href="https://github.com/dtolnay/syn/commit/5c935d2fc27129170c51d11571f55d3f65e90fde"><code>5c935d2</code></a>
Reuse print_subexpression outside of expr.rs</li>
<li><a
href="https://github.com/dtolnay/syn/commit/505ab0091110a607c2c32f4fc45cb7e17f908102"><code>505ab00</code></a>
Fix trailing comma not inserted by rustfmt</li>
<li>See full diff in <a
href="https://github.com/dtolnay/syn/compare/2.0.94...2.0.95">compare
view</a></li>
</ul>
</details>
<br />


[![Dependabot compatibility
score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=syn&package-manager=cargo&previous-version=2.0.94&new-version=2.0.95)](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 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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>