chore(deps): update rust crate dirs to v6 (v2)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
dirs	dependencies	major	5 -> 6

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Configuration

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♻ Rebasing: Whenever PR is behind base branch, 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: Cargo.lock

Command failed: cargo update --config net.git-fetch-with-cli=true --manifest-path plugins/updater/Cargo.toml --package [email protected] --precise 6.0.0
    Updating crates.io index
error: failed to select a version for the requirement `dirs = "^5"`
candidate versions found which didn't match: 6.0.0
location searched: crates.io index
required by package `tauri v2.2.2`
    ... which satisfies dependency `tauri = "^2"` (locked to 2.2.2) of package `tauri-plugin-autostart v2.2.0 (/tmp/renovate/repos/github/tauri-apps/plugins-workspace/plugins/autostart)`

[github-actions]

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