Bump snowballstemmer from 2.1.0 to 2.2.0 (#8787)

Bumps [snowballstemmer](https://github.com/snowballstem/snowball) from
2.1.0 to 2.2.0.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/snowballstem/snowball/blob/master/NEWS">snowballstemmer's
changelog</a>.</em></p>
<blockquote>
<h1>Snowball 2.2.0 (2021-11-10)</h1>
<h2>New Code Generators</h2>
<ul>
<li>Add Ada generator from Stephane Carrez (<a
href="https://redirect.github.com/snowballstem/snowball/issues/135">#135</a>).</li>
</ul>
<h2>Javascript</h2>
<ul>
<li>
<p>Fix generated code to use integer division rather than floating point
division.</p>
<p>Noted by David Corbett.</p>
</li>
</ul>
<h2>Pascal</h2>
<ul>
<li>
<p>Fix code generated for division. Previously real division was used
and the
generated code would fail to compile with an &quot;Incompatible
types&quot; error.</p>
<p>Noted by David Corbett.</p>
</li>
<li>
<p>Fix code generated for Snowball's <code>minint</code> and
<code>maxint</code> constant.</p>
</li>
</ul>
<h2>Python</h2>
<ul>
<li>
<p>Python 2 is no longer actively supported, as proposed on the mailing
list:
<a
href="https://lists.tartarus.org/pipermail/snowball-discuss/2021-August/001721.html">https://lists.tartarus.org/pipermail/snowball-discuss/2021-August/001721.html</a></p>
</li>
<li>
<p>Fix code generated for division. Previously the Python code we
generated
used integer division but rounded negative fractions towards negative
infinity rather than zero under Python 2, and under Python 3 used
floating
point division.</p>
<p>Noted by David Corbett.</p>
</li>
</ul>
<h2>Code Quality Improvements</h2>
<ul>
<li>C#: An <code>among</code> without functions is now generated as
<code>static</code> and groupings
are now generated as constant. Patches from James Turner in <a
href="https://redirect.github.com/snowballstem/snowball/issues/146">#146</a>
and <a
href="https://redirect.github.com/snowballstem/snowball/issues/147">#147</a>.</li>
</ul>
<h2>Code generation improvements</h2>
<ul>
<li>General:</li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/snowballstem/snowball/commit/48a67a2831005f49c48ec29a5837640e23e54e6b"><code>48a67a2</code></a>
Update for 2.2.0</li>
<li><a
href="https://github.com/snowballstem/snowball/commit/ec00981590405827782d4655fcb4e68e9dcb9d43"><code>ec00981</code></a>
Fix handling of len and lenof as names</li>
<li><a
href="https://github.com/snowballstem/snowball/commit/5559db7016d232c0a9f6d9db52ecafce83496740"><code>5559db7</code></a>
Report clearer error if = is used instead of ==</li>
<li><a
href="https://github.com/snowballstem/snowball/commit/4ff359881a651fc921e9966ef39674918f8e426a"><code>4ff3598</code></a>
Optimise constant numeric expressions</li>
<li><a
href="https://github.com/snowballstem/snowball/commit/40b164100328367c426324cdd29ab69114d4ba8e"><code>40b1641</code></a>
NEWS: Update</li>
<li><a
href="https://github.com/snowballstem/snowball/commit/f89c3b9d639b9543222f69b0e24742be1dcfe392"><code>f89c3b9</code></a>
Fix $(EXE_EXT) to $(EXEEXT)</li>
<li><a
href="https://github.com/snowballstem/snowball/commit/55fd44b016303d7103f93f8b1fab9a634f0678ac"><code>55fd44b</code></a>
Ada: Fix code generated for <code>minint</code> and
<code>maxint</code></li>
<li><a
href="https://github.com/snowballstem/snowball/commit/e6d8b6f1d7df1a05fa8fbc11f479069e17b50788"><code>e6d8b6f</code></a>
Pascal: Fix code generated for <code>minint</code></li>
<li><a
href="https://github.com/snowballstem/snowball/commit/ed32a1da901351c225ad1ddcbd5e3bd6f53c3a1f"><code>ed32a1d</code></a>
Ada: Fix &quot;parentheses required for unary minus&quot; errors</li>
<li><a
href="https://github.com/snowballstem/snowball/commit/47773b9a06679972d69f6a2e14f11d5c09f30adf"><code>47773b9</code></a>
NEWS: Update</li>
<li>Additional commits viewable in <a
href="https://github.com/snowballstem/snowball/compare/v2.1.0...v2.2.0">compare
view</a></li>
</ul>
</details>
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requirements/constraints.txt

@@ -207,7 +207,7 @@ six==1.16.0
     #   virtualenv
 slotscheck==0.19.0
     # via -r requirements/lint.in
-snowballstemmer==2.1.0
+snowballstemmer==2.2.0
     # via sphinx
 sphinx==7.1.2
     # via