chore(deps): update rust crate specta to v2.0.0-rc.21 (v2)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
specta	workspace.dependencies	patch	=2.0.0-rc.20 -> =2.0.0-rc.21

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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: Cargo.lock

Command failed: cargo update --config net.git-fetch-with-cli=true --manifest-path Cargo.toml --workspace
    Updating crates.io index
error: failed to select a version for `specta`.
    ... required by package `specta-util v0.0.7`
    ... which satisfies dependency `specta-util = "^0.0.7"` of package `tauri-plugin-geolocation v2.2.1 (/tmp/renovate/repos/github/tauri-apps/plugins-workspace/plugins/geolocation)`
    ... which satisfies path dependency `tauri-plugin-geolocation` (locked to 2.2.1) of package `api v2.0.13 (/tmp/renovate/repos/github/tauri-apps/plugins-workspace/examples/api/src-tauri)`
versions that meet the requirements `=2.0.0-rc.20` are: 2.0.0-rc.20

all possible versions conflict with previously selected packages.

  previously selected package `specta v2.0.0-rc.21`
    ... which satisfies dependency `specta = "=2.0.0-rc.21"` of package `tauri-plugin-geolocation v2.2.1 (/tmp/renovate/repos/github/tauri-apps/plugins-workspace/plugins/geolocation)`
    ... which satisfies path dependency `tauri-plugin-geolocation` (locked to 2.2.1) of package `api v2.0.13 (/tmp/renovate/repos/github/tauri-apps/plugins-workspace/examples/api/src-tauri)`

failed to select a version for `specta` which could resolve this conflict

[github-actions]

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