build(deps): bump panic-semihosting from 0.5.4 to 0.5.6

Bumps [panic-semihosting](https://github.com/rust-embedded/cortex-m) from 0.5.4 to 0.5.6.
- [Release notes](https://github.com/rust-embedded/cortex-m/releases)
- [Changelog](https://github.com/rust-embedded/cortex-m/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-embedded/cortex-m/compare/v0.5.4...v0.5.6)

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

Cargo.lock

@@ -343,9 +343,9 @@ checksum = "de96540e0ebde571dc55c73d60ef407c653844e6f9a1e2fdbd40c07b9252d812"
 
 [[package]]
 name = "panic-semihosting"
-version = "0.5.4"
+version = "0.5.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aed16eb761d0ee9161dd1319cb38c8007813b20f9720a5a682b283e7b8cdfe58"
+checksum = "c3d55dedd501dfd02514646e0af4d7016ce36bc12ae177ef52056989966a1eec"
 dependencies = [
  "cortex-m",
  "cortex-m-semihosting",