Bump external/glad from 0127717 to 73db193

Bumps [external/glad](https://github.com/Dav1dde/glad) from `0127717` to `73db193`.
- [Release notes](https://github.com/Dav1dde/glad/releases)
- [Commits](Dav1dde/glad@0127717...73db193)

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

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