Update Rust crate convert_case to 0.7.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
convert_case	build-dependencies	minor	0.6.0 -> 0.7.0
convert_case	dependencies	minor	0.6.0 -> 0.7.0

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Configuration

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♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: discord-frontend/Cargo.lock

Command failed: cargo update --config net.git-fetch-with-cli=true --manifest-path discord-frontend/hartex-discord-entitycache-macros/Cargo.toml --workspace
error: failed to parse manifest at `/tmp/renovate/repos/github/TeamHarTex/HarTex/discord-frontend/hartex-discord-entitycache-macros/Cargo.toml`

Caused by:
  feature `edition2024` is required

  The package requires the Cargo feature called `edition2024`, but that feature is not stabilized in this version of Cargo (1.84.0 (66221abde 2024-11-19)).
  Consider trying a newer version of Cargo (this may require the nightly release).
  See https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#edition-2024 for more information about the status of this feature.