build: Bump r-efi from 4.5.0 to 5.0.0

Bumps [r-efi](https://github.com/r-efi/r-efi) from 4.5.0 to 5.0.0.
- [Release notes](https://github.com/r-efi/r-efi/releases)
- [Changelog](https://github.com/r-efi/r-efi/blob/main/NEWS.md)
- [Commits](r-efi/r-efi@v4.5.0...v5.0.0)

---
updated-dependencies:
- dependency-name: r-efi
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.toml

@@ -28,7 +28,7 @@ efi-var = []
 [dependencies]
 bitflags = "2.6.0"
 atomic_refcell = "0.1.13"
-r-efi = { version = "4.5.0", features = ["efiapi"] }
+r-efi = { version = "5.0.0", features = ["efiapi"] }
 heapless = "0.8.0"
 log = "0.4.22"