Chore(deps): Bump certifi from 2023.5.7 to 2023.7.22 in /docs (#699)

Bumps [certifi](https://github.com/certifi/python-certifi) from 2023.5.7 to 2023.7.22.
- [Commits](certifi/python-certifi@2023.05.07...2023.07.22)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/requirements.txt

@@ -8,7 +8,7 @@ alabaster==0.7.13
     # via sphinx
 babel==2.12.1
     # via sphinx
-certifi==2023.5.7
+certifi==2023.7.22
     # via requests
 charset-normalizer==3.1.0
     # via requests
@@ -20,8 +20,6 @@ idna==3.4
     # via requests
 imagesize==1.4.1
     # via sphinx
-importlib-metadata==6.6.0
-    # via sphinx
 jinja2==3.1.2
     # via sphinx
 markupsafe==2.1.2
@@ -57,5 +55,3 @@ sphinxcontrib-serializinghtml==1.1.5
     # via sphinx
 urllib3==2.0.2
     # via requests
-zipp==3.15.0
-    # via importlib-metadata