Bump regex from 2025.11.3 to 2026.1.15

Bumps [regex](https://github.com/mrabarnett/mrab-regex) from 2025.11.3 to 2026.1.15.
- [Changelog](https://github.com/mrabarnett/mrab-regex/blob/hg/changelog.txt)
- [Commits](mrabarnett/mrab-regex@2025.11.3...2026.1.15)

---
updated-dependencies:
- dependency-name: regex
  dependency-version: 2026.1.15
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pyproject.toml

@@ -8,7 +8,7 @@ readme = "README.md"
 requires-python = ">=3.10, < 4.0"
 
 dependencies = [
-    "regex >= 2025.0, < 2026.0",
+    "regex>=2025.0,<2027.0",
     "httpx >= 0.28, < 1.0",
     "pydantic >= 2.7, < 3.0",
     "textual >= 6.0",