chore(deps): Update one-shot-mutex requirement from 0.1.1 to 0.2.1

Updates the requirements on [one-shot-mutex](https://github.com/mkroening/one-shot-mutex) to permit the latest version.
- [Release notes](https://github.com/mkroening/one-shot-mutex/releases)
- [Commits](mkroening/one-shot-mutex@v0.1.1...v0.2.1)

---
updated-dependencies:
- dependency-name: one-shot-mutex
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.toml

@@ -15,7 +15,7 @@ generic_once_cell = "0.1"
 interrupts = "0.1"
 interrupt-mutex = "0.1"
 lock_api = "0.4"
-one-shot-mutex = "0.1.1"
+one-shot-mutex = "0.2.1"
 spinning_top = "0.3"
 
 [dev-dependencies]