Bump urllib3 from 2.2.2 to 2.7.0 in /contrib/mbedtls/docs

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.2.2 to 2.7.0.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.2.2...2.7.0)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-version: 2.7.0
  dependency-type: indirect
...

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

Author: dependabot[bot]

contrib/mbedtls/docs/requirements.txt

@@ -25,8 +25,6 @@ idna==3.7
     # via requests
 imagesize==1.4.1
     # via sphinx
-importlib-metadata==8.0.0
-    # via sphinx
 jinja2==3.1.6
     # via sphinx
 markdown-it-py==3.0.0
@@ -41,8 +39,6 @@ pygments==2.18.0
     # via
     #   rich
     #   sphinx
-pytz==2024.1
-    # via babel
 pyyaml==6.0.1
     # via readthedocs-cli
 readthedocs-cli==4
@@ -76,9 +72,5 @@ sphinxcontrib-qthelp==1.0.3
     # via sphinx
 sphinxcontrib-serializinghtml==1.1.5
     # via sphinx
-typing-extensions==4.12.2
-    # via rich
-urllib3==2.2.2
+urllib3==2.7.0
     # via requests
-zipp==3.19.2
-    # via importlib-metadata