Bump cortex-m-rtic in /examples/stm32f4-single-motor-example

Bumps [cortex-m-rtic](https://github.com/rtic-rs/cortex-m-rtic) from 1.1.3 to 1.1.4.
- [Release notes](https://github.com/rtic-rs/cortex-m-rtic/releases)
- [Changelog](https://github.com/rtic-rs/cortex-m-rtic/blob/master/CHANGELOG.md)
- [Commits](rtic-rs/rtic@v1.1.3...v1.1.4)

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

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

Author: dependabot[bot]

examples/stm32f4-single-motor-example/Cargo.lock

@@ -6,7 +6,7 @@ license = "MIT OR Apache-2.0"
 
 [dependencies]
 cortex-m = { version = "0.7", features = ["critical-section-single-core"]}
-cortex-m-rtic = "1.1.3"
+cortex-m-rtic = "1.1.4"
 panic-probe = { version = "0.3", features = ["print-defmt"] }
 
 stm32f4xx-hal = { version = "0.14.0", features = ["stm32f401", "rtic", "rtic-monotonic"] }