chore(deps): bump thirdparty/catch2 from 0b2af56 to a6ee7e2

Bumps [thirdparty/catch2](https://github.com/catchorg/Catch2) from `0b2af56` to `a6ee7e2`.
- [Release notes](https://github.com/catchorg/Catch2/releases)
- [Commits](catchorg/Catch2@0b2af56...a6ee7e2)

---
updated-dependencies:
- dependency-name: thirdparty/catch2
  dependency-type: direct:production
...

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