Bump certifi from 2021.5.30 to 2023.7.22 in /sourcedocs

Bumps [certifi](https://github.com/certifi/python-certifi) from 2021.5.30 to 2023.7.22.
- [Commits](certifi/python-certifi@2021.05.30...2023.07.22)

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

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

sourcedocs/requirements.txt

@@ -8,7 +8,7 @@ alabaster==0.7.12
     # via sphinx
 babel==2.9.1
     # via sphinx
-certifi==2021.5.30
+certifi==2023.7.22
     # via requests
 charset-normalizer==3.2.0
     # via requests
@@ -35,7 +35,7 @@ requests==2.31.0
 snowballstemmer==2.1.0
     # via sphinx
 sphinx==4.1.1
-    # via -r sourcedocs/requirements.in
+    # via -r requirements.in
 sphinxcontrib-applehelp==1.0.2
     # via sphinx
 sphinxcontrib-devhelp==1.0.2