Fedora: rename fedora 31 pkg from Ring to Jami

Fedora 31 package must to be renamed from Ring to Jami

Important:

• Start your work over Igor's commit: https://review.jami.net/c/ring-project/+/12832
• You can take as reference Fedora related changes at https://review.jami.net/c/ring-project/+/12774

Definition of done:

• Fedora package named jami must to be crated and published by jenkins in our internal repo

Keep in mind that using yum the package name must to be jami.