don't lower() the packit pr data before manging it

packit coprs are case sensitive (it's Katello, not katello), but the
lower() was breaking that.

the original idea was that the lower() catches GitHub.COM and other
spellings, but it seems to do more harm than good, so let's remove it

roles/packit/tasks/main.yml

@@ -5,7 +5,7 @@
     chroot: "rhel-{{ ansible_distribution_major_version }}-x86_64"
   loop: "{{ packit_prs | default([]) }}"
   vars:
-    packit_data: "{{ item.lower().replace('https://github.com/', '').replace('/pull', '').split('/') }}"
+    packit_data: "{{ item.replace('https://github.com/', '').replace('/pull', '').split('/') }}"
     packit_org: "{{ packit_data[0] }}"
     packit_repo: "{{ packit_data[1] }}"
     packit_pr: "{{ packit_data[2] }}"