Bump target-lexicon from 0.12.15 to 0.12.16 in /src/rust

Bumps [target-lexicon](https://github.com/bytecodealliance/target-lexicon) from 0.12.15 to 0.12.16.
- [Commits](bytecodealliance/target-lexicon@v0.12.15...v0.12.16)

---
updated-dependencies:
- dependency-name: target-lexicon
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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