Update rich requirement from >=14.0.0 to >=15.0.0 (#225)

Updates the requirements on [rich](https://github.com/Textualize/rich) to permit the latest version.
- [Release notes](https://github.com/Textualize/rich/releases)
- [Changelog](https://github.com/Textualize/rich/blob/master/CHANGELOG.md)
- [Commits](Textualize/rich@v14.0.0...v15.0.0)

---
updated-dependencies:
- dependency-name: rich
  dependency-version: 15.0.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -24,7 +24,7 @@ dependencies = [
     "jinja2>=3.1.6,<4.0.0",
     "lxml>=6.1.0",
     "pydantic>=2.13.3",
-    "rich>=14.0.0",
+    "rich>=15.0.0",
     "tomlkit>=0.14.0",
 ]
 authors = [