Bump wheel from 0.26.0 to 0.38.1 in /doc

Bumps [wheel](https://github.com/pypa/wheel) from 0.26.0 to 0.38.1.
- [Release notes](https://github.com/pypa/wheel/releases)
- [Changelog](https://github.com/pypa/wheel/blob/main/docs/news.rst)
- [Commits](pypa/wheel@0.26.0...0.38.1)

---
updated-dependencies:
- dependency-name: wheel
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

servant-quickcheck/doc/requirements.txt

@@ -0,0 +1,25 @@
+alabaster==0.7.7
+argh==0.26.1
+Babel==2.2.0
+backports-abc==0.4
+backports.ssl-match-hostname==3.5.0.1
+certifi==2015.11.20.1
+CommonMark==0.5.4
+docutils==0.12
+Jinja2==2.8
+livereload==2.4.1
+MarkupSafe==0.23
+pathtools==0.1.2
+Pygments==2.1.1
+pytz==2015.7
+PyYAML==3.11
+recommonmark==0.4.0
+singledispatch==3.4.0.3
+six==1.10.0
+snowballstemmer==1.2.1
+Sphinx==1.3.4
+sphinx-autobuild==0.5.2
+sphinx-rtd-theme==0.1.9
+tornado==4.3
+watchdog==0.8.3
+wheel==0.38.1