Bump the submodules group across 1 directory with 2 updates

Bumps the submodules group with 2 updates in the / directory: [external/d3d8to9](https://github.com/crosire/d3d8to9) and [external/minidx9](https://github.com/hrydgard/minidx9).


Updates `external/d3d8to9` from `2b25f27` to `466fb1f`
- [Release notes](https://github.com/crosire/d3d8to9/releases)
- [Commits](crosire/d3d8to9@2b25f27...466fb1f)

Updates `external/minidx9` from `7751cf7` to `f481ecb`
- [Commits](hrydgard/minidx9@7751cf7...f481ecb)

---
updated-dependencies:
- dependency-name: external/d3d8to9
  dependency-type: direct:production
  dependency-group: submodules
- dependency-name: external/minidx9
  dependency-type: direct:production
  dependency-group: submodules
...

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