Bump regex from 2022.10.31 to 2023.10.3 in /docs

Bumps [regex](https://github.com/mrabarnett/mrab-regex) from 2022.10.31 to 2023.10.3.
- [Changelog](https://github.com/mrabarnett/mrab-regex/blob/hg/changelog.txt)
- [Commits](mrabarnett/mrab-regex@2022.10.31...2023.10.3)

---
updated-dependencies:
- dependency-name: regex
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

docs/requirements.txt

@@ -22,7 +22,7 @@ pyparsing==3.1.1
 python-dateutil==2.8.2
 PyYAML==6.0.1
 pyyaml_env_tag==0.1
-regex==2022.10.31
+regex==2023.10.3
 requests==2.31.0
 six==1.16.0
 termcolor==2.3.0