Bump certifi from 2023.5.7 to 2023.7.22 in /requirements

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>

Author: dependabot[bot]

requirements/docs.txt

@@ -9,7 +9,7 @@ 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
@@ -28,7 +28,7 @@ packaging==23.1
     #   pallets-sphinx-themes
     #   sphinx
 pallets-sphinx-themes==2.1.1
-    # via -r requirements/docs.in
+    # via -r docs.in
 pygments==2.15.1
     # via sphinx
 requests==2.31.0
@@ -37,12 +37,12 @@ snowballstemmer==2.2.0
     # via sphinx
 sphinx==7.0.1
     # via
-    #   -r requirements/docs.in
+    #   -r docs.in
     #   pallets-sphinx-themes
     #   sphinx-issues
     #   sphinxcontrib-log-cabinet
 sphinx-issues==3.0.1
-    # via -r requirements/docs.in
+    # via -r docs.in
 sphinxcontrib-applehelp==1.0.4
     # via sphinx
 sphinxcontrib-devhelp==1.0.2
@@ -52,7 +52,7 @@ sphinxcontrib-htmlhelp==2.0.1
 sphinxcontrib-jsmath==1.0.1
     # via sphinx
 sphinxcontrib-log-cabinet==1.0.1
-    # via -r requirements/docs.in
+    # via -r docs.in
 sphinxcontrib-qthelp==1.0.3
     # via sphinx
 sphinxcontrib-serializinghtml==1.1.5