Bump webrick from 1.8.2 to 1.9.1 in /docs/_spec (#22066)

Bumps [webrick](https://github.com/ruby/webrick) from 1.8.2 to 1.9.1.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/ruby/webrick/releases">webrick's
releases</a>.</em></p>
<blockquote>
<h2>v1.9.1</h2>
<h2>What's Changed</h2>
<ul>
<li>Block of server.start is optional by <a
href="https://github.com/znz"><code>@​znz</code></a> in <a
href="https://redirect.github.com/ruby/webrick/pull/155">ruby/webrick#155</a></li>
<li>Fix bugs and improve by <a
href="https://github.com/znz"><code>@​znz</code></a> in <a
href="https://redirect.github.com/ruby/webrick/pull/152">ruby/webrick#152</a></li>
<li>Bump step-security/harden-runner from 2.10.1 to 2.10.2 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/ruby/webrick/pull/157">ruby/webrick#157</a></li>
<li>Bump rubygems/release-gem from
612653d273a73bdae1df8453e090060bb4db5f31 to
9e85cb11501bebc2ae661c1500176316d3987059 by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a> in <a
href="https://redirect.github.com/ruby/webrick/pull/159">ruby/webrick#159</a></li>
<li>Change backquote to singlequote in messages by <a
href="https://github.com/znz"><code>@​znz</code></a> in <a
href="https://redirect.github.com/ruby/webrick/pull/154">ruby/webrick#154</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/ruby/webrick/compare/v1.9.0...v1.9.1">https://github.com/ruby/webrick/compare/v1.9.0...v1.9.1</a></p>
<h2>v1.9.0</h2>
<h2>What's Changed</h2>
<ul>
<li>Be clear in README that webrick should not be used in production by
<a href="https://github.com/jeremyevans"><code>@​jeremyevans</code></a>
in <a
href="https://redirect.github.com/ruby/webrick/pull/149">ruby/webrick#149</a></li>
<li>Add RBS files by <a
href="https://github.com/znz"><code>@​znz</code></a> in <a
href="https://redirect.github.com/ruby/webrick/pull/151">ruby/webrick#151</a></li>
<li>Prepare new release by <a
href="https://github.com/znz"><code>@​znz</code></a> in <a
href="https://redirect.github.com/ruby/webrick/pull/153">ruby/webrick#153</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a href="https://github.com/znz"><code>@​znz</code></a> made their
first contribution in <a
href="https://redirect.github.com/ruby/webrick/pull/151">ruby/webrick#151</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/ruby/webrick/compare/v1.8.2...v1.9.0">https://github.com/ruby/webrick/compare/v1.8.2...v1.9.0</a></p>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/ruby/webrick/commit/307f24c0e9624e56fdbe8ebbe6df03ee25e9e57b"><code>307f24c</code></a>
Bump up v1.9.1</li>
<li><a
href="https://github.com/ruby/webrick/commit/74303648c8f900a7bb7cdf8dec4337051dafb34a"><code>7430364</code></a>
Change backquote to singlequote in messages (<a
href="https://redirect.github.com/ruby/webrick/issues/154">#154</a>)</li>
<li><a
href="https://github.com/ruby/webrick/commit/1ff2b8962374db092d8d73896add271681abdc6e"><code>1ff2b89</code></a>
Fixed version number of rubygems/release-gem</li>
<li><a
href="https://github.com/ruby/webrick/commit/fc9123527bcb185ab58ca4d96b76009bb1312c59"><code>fc91235</code></a>
Merge pull request <a
href="https://redirect.github.com/ruby/webrick/issues/159">#159</a> from
ruby/dependabot/github_actions/rubygems/release-...</li>
<li><a
href="https://github.com/ruby/webrick/commit/a34a69b4c5b218a0239331655c7b14f6ac081513"><code>a34a69b</code></a>
Bump rubygems/release-gem</li>
<li><a
href="https://github.com/ruby/webrick/commit/cde6dd4ba4358923e0eedd3ef11d517f931eb9b8"><code>cde6dd4</code></a>
Merge pull request <a
href="https://redirect.github.com/ruby/webrick/issues/157">#157</a> from
ruby/dependabot/github_actions/step-security/har...</li>
<li><a
href="https://github.com/ruby/webrick/commit/633acb6789ed052f11e19cd892c17247c78c87b4"><code>633acb6</code></a>
Bump step-security/harden-runner from 2.10.1 to 2.10.2</li>
<li><a
href="https://github.com/ruby/webrick/commit/cb93ef8144b10832b591a7e8c472cdd5d024a750"><code>cb93ef8</code></a>
Fix bugs and improve (<a
href="https://redirect.github.com/ruby/webrick/issues/152">#152</a>)</li>
<li><a
href="https://github.com/ruby/webrick/commit/ef2c69d0653aad2a25a287c7d55861b89d45148b"><code>ef2c69d</code></a>
Block of server.start is optional (<a
href="https://redirect.github.com/ruby/webrick/issues/155">#155</a>)</li>
<li><a
href="https://github.com/ruby/webrick/commit/516db777a61e269266fcd85cc9c866e4fef37aef"><code>516db77</code></a>
Merge pull request <a
href="https://redirect.github.com/ruby/webrick/issues/153">#153</a> from
znz/prepare-new-release</li>
<li>Additional commits viewable in <a
href="https://github.com/ruby/webrick/compare/v1.8.2...v1.9.1">compare
view</a></li>
</ul>
</details>
<br />


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</details>

docs/_spec/Gemfile.lock

@@ -41,7 +41,7 @@ GEM
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    webrick (1.8.2)
+    webrick (1.9.1)
 
 PLATFORMS
   ruby