Bump suite from 8a502de to a13bcf6

Bumps [suite](https://github.com/python-jsonschema/referencing-suite) from `8a502de` to `a13bcf6`.
- [Release notes](https://github.com/python-jsonschema/referencing-suite/releases)
- [Commits](python-jsonschema/referencing-suite@8a502de...a13bcf6)

---
updated-dependencies:
- dependency-name: suite
  dependency-version: a13bcf6495e8e4d2f33f136c50d914021995eafa
  dependency-type: direct:production
...

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Author: dependabot[bot]