Allow Dependabot cooldown key in spelling checks

[denelon]

Relevant area(s)

WinGet CLI

Relevant command(s)

N/A — repository validation tooling

Brief description of your issue

The Check Spelling workflow rejects the valid Dependabot configuration key cooldown introduced by #6471. This prevents that pull request from passing required validation even though the key is supported Dependabot syntax.

Steps to reproduce

1. Add a .github/dependabot.yml configuration containing the supported cooldown key.
2. Open a pull request.
3. Observe the Check Spelling workflow failure for cooldown.

Expected behavior

The spelling check accepts the valid Dependabot configuration key and allows the pull request to proceed to its remaining validation.

Actual behavior

The Check Spelling workflow reports cooldown as an unrecognized word and fails the pull request.

Environment

GitHub Actions
check-spelling/check-spelling@v0.0.26
microsoft/winget-cli master