Bump urllib3 from 2.1.0 to 2.2.2 in /docs

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.1.0 to 2.2.2.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.1.0...2.2.2)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-type: indirect
...

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

docs/requirements.txt

@@ -22,10 +22,6 @@ imagesize==1.4.1
     # via sphinx
 jinja2==3.1.3
     # via sphinx
-lxml==5.2.2
-    # via mscxyz (pyproject.toml)
-lxml-stubs==0.5.1
-    # via mscxyz (pyproject.toml)
 markupsafe==2.1.3
     # via jinja2
 packaging==23.2
@@ -34,13 +30,11 @@ pygments==2.17.2
     # via sphinx
 requests==2.32.0
     # via sphinx
-shtab==1.7.1
-    # via mscxyz (pyproject.toml)
 snowballstemmer==2.2.0
     # via sphinx
 sphinx==7.2.6
     # via
-    #   -r docs/requirements.in
+    #   -r requirements.in
     #   sphinx-rtd-theme
     #   sphinxcontrib-applehelp
     #   sphinxcontrib-devhelp
@@ -49,7 +43,7 @@ sphinx==7.2.6
     #   sphinxcontrib-qthelp
     #   sphinxcontrib-serializinghtml
 sphinx-rtd-theme==2.0.0
-    # via -r docs/requirements.in
+    # via -r requirements.in
 sphinxcontrib-applehelp==1.0.7
     # via sphinx
 sphinxcontrib-devhelp==1.0.5
@@ -64,11 +58,5 @@ sphinxcontrib-qthelp==1.0.6
     # via sphinx
 sphinxcontrib-serializinghtml==1.1.9
     # via sphinx
-termcolor==2.4.0
-    # via mscxyz (pyproject.toml)
-tmep==3.0.0
-    # via mscxyz (pyproject.toml)
-unidecode==1.3.8
-    # via tmep
-urllib3==2.1.0
+urllib3==2.2.2
     # via requests