feat(dependabot): track _all_ updates for design-tokens package

[LuLaValva]

Configure dependabot so that it triggers a PR for all patch updates to @ebay/design-tokens, to ensure that we are always up to date.

• This should remove the need for issues like Add new core and semantic tokens to the system #675

[changeset-bot]

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Latest commit: 084bfd3

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[Copilot]

Pull request overview

This PR adds Dependabot configuration for the root npm project to monitor @ebay/design-tokens updates.

Changes:

• Adds .github/dependabot.yml.
• Configures daily npm update checks for @ebay/design-tokens.
• Ignores major and minor version updates.

[ArtBlue]

Looks good.