[chore(cargo)](deps): Bump wat from 1.0.66 to 1.0.68

Bumps [wat](https://github.com/bytecodealliance/wasm-tools) from 1.0.66 to 1.0.68.
- [Release notes](https://github.com/bytecodealliance/wasm-tools/releases)
- [Commits](bytecodealliance/wasm-tools@wat-1.0.66...wat-1.0.68)

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

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