Bump test/fixtures/prism from 5202e5f to 9bc992f

Bumps [test/fixtures/prism](https://github.com/ruby/prism) from `5202e5f` to `9bc992f`.
- [Release notes](https://github.com/ruby/prism/releases)
- [Commits](ruby/prism@5202e5f...9bc992f)

---
updated-dependencies:
- dependency-name: test/fixtures/prism
  dependency-version: 9bc992fd1fe0273c82b119234c01114a5fba8106
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]