chore(deps): update rust crate config to 0.15

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
config	dependencies	minor	0.14 -> 0.15

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Release Notes

rust-cli/config-rs (config)

v0.15.4

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Performance

• Reduce TOML build times

v0.15.3

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Internal

• Clean ups

v0.15.2

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Fixes

• Provide an error message on path parsing errors (regression from 0.15.0)
• Improve quality of path parsing error messages

v0.15.1

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Fixes

• Don't crash on get(arr[-1]) on empty arrays
• Don't crash on set_override(arr[-1]) on empty arrays

v0.15.0

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Compatibility

• ConfigError is no longer exhaustive
• ConfigError::Parses type changed
• FileFormat is no longer exhaustive
• Deprecated functions removed
• Case insensitivity from 0.14.0 was reverted

Fixes

• Struct fields, variants, and lookup paths with uppercase letters can be used again (regression from 0.14.0)

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Configuration

📅 Schedule: Branch creation - "* 0-3 * * 1" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

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

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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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 --package config@0.14.1 --precise 0.15.4
    Updating crates.io index
error: failed to select a version for the requirement `config = "^0.14.0"`
candidate versions found which didn't match: 0.15.4
location searched: crates.io index
required by package `cocogitto v6.2.0`
    ... which satisfies dependency `cocogitto = "^6.2"` (locked to 6.2.0) of package `koji v3.0.0 (/tmp/renovate/repos/github/cococonscious/koji)`

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅