Bump requests from 2.28.2 to 2.31.0 in /docs

Bumps [requests](https://github.com/psf/requests) from 2.28.2 to 2.31.0.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](https://github.com/psf/requests/compare/v2.28.2...v2.31.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/docs/requirements.txt b/docs/requirements.txt
index a1bfd82..0a97fe8 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -25,8 +25,6 @@
     # via requests
 imagesize==1.4.1
     # via sphinx
-importlib-metadata==6.0.0
-    # via sphinx
 jinja2==3.1.2
     # via sphinx
 markdown-it-py==2.2.0
@@ -45,7 +43,7 @@
     # via readthedocs-cli
 readthedocs-cli==4
     # via -r requirements.in
-requests==2.28.2
+requests==2.31.0
     # via
     #   readthedocs-cli
     #   sphinx
@@ -75,8 +73,6 @@
     # via sphinx
 urllib3==1.26.15
     # via requests
-zipp==3.15.0
-    # via importlib-metadata
 
 # The following packages are considered to be unsafe in a requirements file:
 # setuptools