Bump convert_case from 0.6.0 to 0.8.0 in /rust (#5591)

* Bump convert_case from 0.6.0 to 0.8.0 in /rust

Bumps [convert_case](https://github.com/rutrum/convert-case) from 0.6.0 to 0.8.0.
- [Commits](https://github.com/rutrum/convert-case/commits)

---
updated-dependencies:
- dependency-name: convert_case
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

* A snapshot a day keeps the bugs away! 📷🐛 (OS: namespace-profile-ubuntu-8-cores)

---------

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rust/kcl-derive-docs/Cargo.toml

@@ -13,7 +13,7 @@ proc-macro = true
 
 [dependencies]
 Inflector = "0.11.4"
-convert_case = "0.6.0"
+convert_case = "0.8.0"
 once_cell = "1.20.2"
 proc-macro2 = "1"
 quote = "1"