Bump deps/DirectXMath from 78922ff to d2bb6c0

Bumps [deps/DirectXMath](https://github.com/microsoft/DirectXMath) from `78922ff` to `d2bb6c0`.
- [Release notes](https://github.com/microsoft/DirectXMath/releases)
- [Commits](microsoft/DirectXMath@78922ff...d2bb6c0)

---
updated-dependencies:
- dependency-name: deps/DirectXMath
  dependency-type: direct:production
...

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Author: dependabot[bot]