Upgrade: Bump regex from 2022.3.2 to 2022.3.15 (#288)

Bumps [regex](https://github.com/mrabarnett/mrab-regex) from 2022.3.2 to 2022.3.15.
- [Release notes](https://github.com/mrabarnett/mrab-regex/releases)
- [Commits](https://github.com/mrabarnett/mrab-regex/commits)

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

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

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

requirements.txt

@@ -19,7 +19,7 @@ openttd-helpers==1.0.1
 ply==3.11
 python-slugify==6.1.1
 PyYAML==6.0
-regex==2022.3.2
+regex==2022.3.15
 rfc3986==1.5.0
 sentry-sdk==1.5.8
 smmap==5.0.0