Normalize registry before creating path to destination images

[EyeCantCU]

Description

Ensures usernames in the registry path are always lowercase. This fixes an issue where user's with uppercase letters in their username can't push to container registries

Related Issue(s)

Resolves: https://github.com/redhat-actions/push-to-registry/issues/67

Checklist

• [ ] This PR includes a documentation change

• [x] This PR does not need a documentation change

• [ ] This PR includes test changes

• [x] This PR's changes are already tested

• [x] This change is not user-facing
• [x] This change is a patch change
• [x] This change is a minor change
• [ ] This change is a major (breaking) change

Changes made

• Normalizes input for registry passed to the action
• Updates distributed bundle

[andreyrd]

Can this get merged?:) Figured out why my new pipeline was failing...

Edit: The easiest solution is to manually put the lowercase version of your username into the workflow file, but this would help new users not run into the same issue.