Update panic-semihosting requirement from 0.5.2 to 0.6.0

Updates the requirements on [panic-semihosting](https://github.com/rust-embedded/cortex-m) to permit the latest version.
- [Release notes](https://github.com/rust-embedded/cortex-m/releases)
- [Changelog](https://github.com/rust-embedded/cortex-m/blob/master/CHANGELOG.md)
- [Commits](rust-embedded/cortex-m@v0.5.2...v0.6.0)

---
updated-dependencies:
- dependency-name: panic-semihosting
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -37,7 +37,7 @@ systick-monotonic = "1.0.0"
 
 [dev-dependencies.panic-semihosting]
 features = ["exit"]
-version = "0.5.2"
+version = "0.6.0"
 
 [target.x86_64-unknown-linux-gnu.dev-dependencies]
 trybuild = "1"