build(deps): bump rich from 14.2.0 to 14.3.1

Bumps [rich](https://github.com/Textualize/rich) from 14.2.0 to 14.3.1.
- [Release notes](https://github.com/Textualize/rich/releases)
- [Changelog](https://github.com/Textualize/rich/blob/master/CHANGELOG.md)
- [Commits](https://github.com/Textualize/rich/compare/v14.2.0...v14.3.1)

---
updated-dependencies:
- dependency-name: rich
  dependency-version: 14.3.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -15,6 +15,6 @@ coloredlogs == 15.0.1  # for colored logging
 PyYAML == 6.0.3        # for parsing/writing YAML
 oras == 0.2.38         # for OCI stuff in mapper-oci-update
 Jinja2 == 3.1.6        # for templating
-rich == 14.2.0         # for rich text formatting
+rich == 14.3.1         # for rich text formatting
 dtschema == 2025.12     # for checking dts files and dt bindings
 yamllint == 1.38.0     # for checking dts files and dt bindings