Bump cortex-m-rt from 0.7.3 to 0.7.5 (#6)

Bumps [cortex-m-rt](https://github.com/rust-embedded/cortex-m) from 0.7.3 to 0.7.5.
- [Release notes](https://github.com/rust-embedded/cortex-m/releases)
- [Changelog](https://github.com/rust-embedded/cortex-m/blob/v0.7.5/CHANGELOG.md)
- [Commits](rust-embedded/cortex-m@v0.7.3...v0.7.5)

---
updated-dependencies:
- dependency-name: cortex-m-rt
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.toml

@@ -34,7 +34,7 @@ features = [
 version = "0.7.7"
 
 [workspace.dependencies.cortex-m-rt]
-version = "0.7.3"
+version = "0.7.5"
 
 [workspace.dependencies.defmt]
 version = "0.3.8"