fix: acceptance tests fix on matching ubi version

[pacostas]

Summary

This pr fixes the failure on acceptance tests due to ubi version has been upgraded to the latest one. The fix uses a regex for matching the ubi version instead of a fixed number.

The acceptance tests run each time there is a new release and at the moment the release for ubi-base-stack has been block due to that. The failure is available here https://github.com/paketo-community/ubi-base-stack/issues/13 After this PR has been merge the https://github.com/paketo-community/ubi-base-stack/issues/13 can be closed.

Use Cases

Checklist

• [x] I have viewed, signed, and submitted the Contributor License Agreement.
• [x] I have linked issue(s) that this PR should close using keywords or the Github UI (See docs)
• [x] I have added an integration test, if necessary.
• [x] I have reviewed the styleguide for guidance on my code quality.
• [x] I'm happy with the commit history on this PR (I have rebased/squashed as needed).