Bump urllib3 from 2.0.4 to 2.0.6 in /docs

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.0.4 to 2.0.6.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.0.4...2.0.6)

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

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

docs/requirements.txt

@@ -10,7 +10,7 @@ babel==2.12.1
     # via sphinx
 build==0.10.0
     # via
-    #   -r docs/requirements.in
+    #   -r requirements.in
     #   pip-tools
 certifi==2023.7.22
     # via requests
@@ -33,7 +33,7 @@ packaging==23.1
     #   build
     #   sphinx
 pip-tools==7.3.0
-    # via -r docs/requirements.in
+    # via -r requirements.in
 pygments==2.16.1
     # via sphinx
 pyproject-hooks==1.0.0
@@ -44,7 +44,7 @@ snowballstemmer==2.2.0
     # via sphinx
 sphinx==7.1.2
     # via
-    #   -r docs/requirements.in
+    #   -r requirements.in
     #   sphinxcontrib-applehelp
     #   sphinxcontrib-devhelp
     #   sphinxcontrib-htmlhelp
@@ -62,7 +62,7 @@ sphinxcontrib-qthelp==1.0.5
     # via sphinx
 sphinxcontrib-serializinghtml==1.1.7
     # via sphinx
-urllib3==2.0.4
+urllib3==2.0.6
     # via requests
 wheel==0.41.1
     # via pip-tools