🌱 bump regex from 2026.7.19 to 2026.8.31 (#2918)

Bumps [regex](https://github.com/mrabarnett/mrab-regex) from 2026.7.19 to 2026.8.31.
- [Changelog](https://github.com/mrabarnett/mrab-regex/blob/hg/changelog.txt)
- [Commits](mrabarnett/mrab-regex@2026.7.19...2026.8.31)

---
updated-dependencies:
- dependency-name: regex
  dependency-version: 2026.8.31
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -27,7 +27,7 @@ python-dateutil==2.9.0.post0
 PyYAML==6.0.3
 pyyaml_env_tag==1.1
 readtime==3.0.0
-regex==2026.7.19
+regex==2026.8.31
 requests==2.34.2
 six==1.17.0
 soupsieve==2.9.2