Bump the generic group across 1 directory with 2 updates

Bumps the generic group with 2 updates in the / directory: [external/Catch2](https://github.com/catchorg/Catch2) and [tests/external/kissfft](https://github.com/mborgerding/kissfft).


Updates `external/Catch2` from `b62413a` to `cd93d20`
- [Release notes](https://github.com/catchorg/Catch2/releases)
- [Commits](catchorg/Catch2@b62413a...cd93d20)

Updates `tests/external/kissfft` from `9feadb9` to `7bce415`
- [Release notes](https://github.com/mborgerding/kissfft/releases)
- [Commits](mborgerding/kissfft@9feadb9...7bce415)

---
updated-dependencies:
- dependency-name: external/Catch2
  dependency-version: cd93d202e047f91370b922f09db2e658653088de
  dependency-type: direct:production
  dependency-group: generic
- dependency-name: tests/external/kissfft
  dependency-version: 7bce4153c6bc8aba2db0e889e576f9d00505cbe1
  dependency-type: direct:production
  dependency-group: generic
...

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Author: dependabot[bot]