Bump the cargo group across 1 directory with 2 updates

Bumps the cargo group with 2 updates in the /weather-server-rust directory: [tracing-subscriber](https://github.com/tokio-rs/tracing) and [slab](https://github.com/tokio-rs/slab).


Updates `tracing-subscriber` from 0.3.19 to 0.3.20
- [Release notes](https://github.com/tokio-rs/tracing/releases)
- [Commits](tokio-rs/tracing@tracing-subscriber-0.3.19...tracing-subscriber-0.3.20)

Updates `slab` from 0.4.10 to 0.4.11
- [Release notes](https://github.com/tokio-rs/slab/releases)
- [Changelog](https://github.com/tokio-rs/slab/blob/master/CHANGELOG.md)
- [Commits](tokio-rs/slab@v0.4.10...v0.4.11)

---
updated-dependencies:
- dependency-name: tracing-subscriber
  dependency-version: 0.3.20
  dependency-type: direct:production
  dependency-group: cargo
- dependency-name: slab
  dependency-version: 0.4.11
  dependency-type: indirect
  dependency-group: cargo
...

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Author: dependabot[bot]