build(deps): bump yamllint from 1.37.1 to 1.38.0

Bumps [yamllint](https://github.com/adrienverge/yamllint) from 1.37.1 to 1.38.0.
- [Release notes](https://github.com/adrienverge/yamllint/releases)
- [Changelog](https://github.com/adrienverge/yamllint/blob/master/CHANGELOG.rst)
- [Commits](adrienverge/yamllint@v1.37.1...v1.38.0)

---
updated-dependencies:
- dependency-name: yamllint
  dependency-version: 1.38.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -17,4 +17,4 @@ 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
 dtschema == 2025.12     # for checking dts files and dt bindings
-yamllint == 1.37.1     # for checking dts files and dt bindings
+yamllint == 1.38.0     # for checking dts files and dt bindings