Bump test/fixtures/prism from 7366114 to b3cef9d

Bumps [test/fixtures/prism](https://github.com/ruby/prism) from `7366114` to `b3cef9d`.
- [Release notes](https://github.com/ruby/prism/releases)
- [Commits](ruby/prism@7366114...b3cef9d)

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

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