cmd/search: use new Fedora package search

[rwhogg]

pkgdb has been put into read-only mode,
so it won't be updated for new Fedora releases
going forward. Use apps.fedoraproject.org/packages instead.

Signed-off-by: Bob W. Hogg [email protected]

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same change?
• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes? Here's an example.
• Have you successfully run brew tests with your changes locally?

See https://fedoraproject.org/wiki/Infrastructure/WhatHappenedToPkgdb if you're interested in why it's getting decommissioned.

[MikeMcQuaid]

Thanks again @rwhogg!