Protected packages: Use capitalized casing in setting ui table

What does this MR do and why?

• Adjusts the letter casing for strings in the table "package protection rules"
• This MR is a follow-up todo from the review of another MR
• This MR tackles one checklist item, see Align letter casing across the table columns ... in #413641

🛠 with ❤ at Siemens

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

MR Checklist (@gerardo-navarro)

• Changelog entry added, if necessary
• Documentation created/updated via this MR
• Documentation reviewed by technical writer or follow-up review issue created
• Tests added for this feature/bug
• Tested in all supported browsers
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the javascript style guides
• Conforms to the database guides

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. In rails console enable the experiment fully

Feature.enable(:packages_protected_packages)

2. Add some package protection rules

Packages::Protection::Rule.create(project: Project.find_by_full_path('flightjs/Flight'), package_name_pattern: "@flightjs/flight-package-1", package_type: :npm, push_protected_up_to_access_level: :maintainer)

Packages::Protection::Rule.create(project: Project.find_by_full_path('flightjs/Flight'), package_name_pattern: "@flightjs/flight-package-2", package_type: :npm, push_protected_up_to_access_level: :owner)

3. Go to http://gdk.test:3000/flightjs/Flight/-/settings/packages_and_registries

Related to #413641