Bump urllib3 from 2.2.2 to 2.6.3 in /docs

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.2.2 to 2.6.3.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.2.2...2.6.3)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-version: 2.6.3
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

docs/requirements.txt

@@ -43,11 +43,11 @@ mdit-py-plugins==0.4.1
 mdurl==0.1.2
     # via markdown-it-py
 myst-parser==4.0.0
-    # via -r docs/requirements.in
+    # via -r requirements.in
 packaging==24.1
     # via sphinx
 pydata-sphinx-theme==0.16.1
-    # via -r docs/requirements.in
+    # via -r requirements.in
 pygments==2.18.0
     # via
     #   accessible-pygments
@@ -63,16 +63,16 @@ soupsieve==2.5
     # via beautifulsoup4
 sphinx==7.2.6
     # via
-    #   -r docs/requirements.in
+    #   -r requirements.in
     #   myst-parser
     #   pydata-sphinx-theme
     #   sphinx-design
     #   sphinx-rtd-theme
     #   sphinxcontrib-jquery
 sphinx-design==0.6.1
-    # via -r docs/requirements.in
+    # via -r requirements.in
 sphinx-rtd-theme==3.0.2
-    # via -r docs/requirements.in
+    # via -r requirements.in
 sphinxcontrib-applehelp==1.0.8
     # via sphinx
 sphinxcontrib-devhelp==1.0.6
@@ -89,5 +89,5 @@ sphinxcontrib-serializinghtml==1.1.10
     # via sphinx
 typing-extensions==4.12.2
     # via pydata-sphinx-theme
-urllib3==2.2.2
+urllib3==2.6.3
     # via requests