deps(deps): update python-frontmatter requirement in /scripts

Updates the requirements on [python-frontmatter](https://github.com/eyeseast/python-frontmatter) to permit the latest version.
- [Release notes](https://github.com/eyeseast/python-frontmatter/releases)
- [Commits](eyeseast/python-frontmatter@v1.0.0...v1.3.0)

---
updated-dependencies:
- dependency-name: python-frontmatter
  dependency-version: 1.3.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

scripts/requirements.txt

@@ -1,4 +1,4 @@
 # Validation script dependencies. Kept tiny on purpose.
 jsonschema>=4.0,<5
-python-frontmatter>=1.0,<2
+python-frontmatter>=1.3.0,<2
 PyYAML>=6.0,<7