Bump external/Catch2 from 9f08097 to 50bf00e (microsoft#2297)

Bumps [external/Catch2](https://github.com/catchorg/Catch2) from `9f08097` to `50bf00e`.
- [Release notes](https://github.com/catchorg/Catch2/releases)
- [Commits](catchorg/Catch2@9f08097...50bf00e)

---
updated-dependencies:
- dependency-name: external/Catch2
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>