chore(deps): Bump rustls-pemfile from 2.1.0 to 2.1.1 (#1226)

Bumps [rustls-pemfile](https://github.com/rustls/pemfile) from 2.1.0 to
2.1.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/rustls/pemfile/releases">rustls-pemfile's
releases</a>.</em></p>
<blockquote>
<h2>2.1.1</h2>
<h2>Headlines</h2>
<ul>
<li>Leading whitespace in PEM document bodies is now trimmed in addition
to trailing whitespace.</li>
</ul>
<h2>What's Changed</h2>
<ul>
<li>Trim leading contiguous whitespace, fix nightly clippy warns by <a
href="https://github.com/cpu"><code>@​cpu</code></a> in <a
href="https://redirect.github.com/rustls/pemfile/pull/41">rustls/pemfile#41</a></li>
<li>v2.1.1 preparation by <a
href="https://github.com/cpu"><code>@​cpu</code></a> in <a
href="https://redirect.github.com/rustls/pemfile/pull/42">rustls/pemfile#42</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/rustls/pemfile/compare/v/2.1.0...v/2.1.1">https://github.com/rustls/pemfile/compare/v/2.1.0...v/2.1.1</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/rustls/pemfile/commit/77a6c99a8b800288cac4623342dbf9269f8ba5f3"><code>77a6c99</code></a>
Cargo: version 2.1.0 -&gt; 2.1.1</li>
<li><a
href="https://github.com/rustls/pemfile/commit/09a08fd3f097a4136ebbb513dd94c386b822e6eb"><code>09a08fd</code></a>
proj: add Cargo.lock, use --locked in CI</li>
<li><a
href="https://github.com/rustls/pemfile/commit/95152b4d4b1864babb193f2ca516574a87a2e535"><code>95152b4</code></a>
pemfile: also trim leading contiguous content whitespace</li>
<li><a
href="https://github.com/rustls/pemfile/commit/fc3414f9d2bd78084e5b85d538b8ab6b586f1f77"><code>fc3414f</code></a>
lib: clean up no_std and use of std in test code</li>
<li>See full diff in <a
href="https://github.com/rustls/pemfile/compare/v/2.1.0...v/2.1.1">compare
view</a></li>
</ul>
</details>
<br />


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