chore(deps): bump rustix in /staking-miner-playground (#699)

Bumps [rustix](https://github.com/bytecodealliance/rustix) from 0.35.13 to 0.35.15.
- [Release notes](https://github.com/bytecodealliance/rustix/releases)
- [Commits](bytecodealliance/rustix@v0.35.13...v0.35.15)

---
updated-dependencies:
- dependency-name: rustix
  dependency-type: indirect
...

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