Use patterns syntax for Dependabot groups

[aduth]

🛠 Summary of changes

Attempts to fix Dependabot configuration issues introduced in #10576:

The property '#/updates/0/groups/sync-all-versions' contains additional properties ["allow"] outside of the schema when none are allowed
The property '#/updates/0/groups/sync-all-versions' of type object did not match one or more of the required schemas
The property '#/updates/0/groups/sync-major-versions' contains additional properties ["allow"] outside of the schema when none are allowed
The property '#/updates/0/groups/security' of type object did not match one or more of the required schemas
The property '#/updates/1/groups/sync-all-versions' contains additional properties ["allow"] outside of the schema when none are allowed
The property '#/updates/1/groups/sync-all-versions' of type object did not match one or more of the required schemas
The property '#/updates/1/groups/security' of type object did not match one or more of the required schemas

https://github.com/18F/identity-idp/runs/24823024757

Reference documentation: https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#groups

📜 Testing Plan

Check run after merge.