build(deps): bump wstd from 0.5.4 to 0.5.6

Bumps [wstd](https://github.com/bytecodealliance/wstd) from 0.5.4 to 0.5.6.
- [Release notes](https://github.com/bytecodealliance/wstd/releases)
- [Commits](bytecodealliance/wstd@v0.5.4...v0.5.6)

---
updated-dependencies:
- dependency-name: wstd
  dependency-version: 0.5.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Cargo.lock

@@ -15,4 +15,4 @@ proxy = true
 
 [dependencies]
 wit-bindgen-rt = { version = "0.41.0", features = ["bitflags"] }
-wstd = "0.5.4"
+wstd = "0.5.6"