build(deps): bump oras from 0.1.30 to 0.2.25

Bumps [oras](https://github.com/oras-project/oras-py) from 0.1.30 to 0.2.25.
- [Release notes](https://github.com/oras-project/oras-py/releases)
- [Changelog](https://github.com/oras-project/oras-py/blob/main/CHANGELOG.md)
- [Commits](oras-project/oras-py@0.1.30...0.2.25)

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

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

Author: dependabot[bot]

requirements.txt

@@ -12,7 +12,7 @@ GitPython == 3.1.43    # for manipulating git repos
 unidecode == 1.3.8     # for converting strings to ascii
 coloredlogs == 15.0.1  # for colored logging
 PyYAML == 6.0.2        # for parsing/writing YAML
-oras == 0.1.30         # for OCI stuff in mapper-oci-update
+oras == 0.2.25         # for OCI stuff in mapper-oci-update
 Jinja2 == 3.1.4        # for templating
 rich == 13.9.4         # for rich text formatting
 dtschema == 2024.11     # for checking dts files and dt bindings