fix(pkgrepo): Set proper keyring and hash for ubuntu.

salt/osmap.yaml

 
 Ubuntu:
   pkgrepo: 'deb [signed-by=/usr/share/keyrings/salt-archive-keyring.gpg arch=amd64] {{ salt_repo }}/{{ py_ver_repr or 'apt' }}/{{ os_lower }}/{{ osrelease }}/amd64/{{ salt_release }} {{ oscodename }} main'
-  pkgrepo_keyring: '{{ salt_repo }}/{{ py_ver_repr or 'apt' }}/{{ os_lower }}/{{ osrelease }}/amd64/{{ salt_release }}/salt-archive-keyring.gpg'
-  pkgrepo_keyring_hash: sha256=ea38e0cdbd8dc53e1af154a8d711a2a321a69f81188062dc5cde9d54df2b8c47
+  pkgrepo_keyring: '{{ salt_repo }}/{{ py_ver_repr or 'apt' }}/{{ os_lower }}/{{ osrelease }}/amd64/{{ salt_release }}/{{ salt_repo_keyring_filename }}'
+  pkgrepo_keyring_hash: '{{ salt_repo_keyring_hash }}'
   key_url: '{{ salt_repo }}/{{ py_ver_repr or 'apt' }}/{{ os_lower }}/{{ osrelease }}/amd64/{{ salt_release }}/{{ salt_repo_keyring_filename }}'
   pygit2: python-pygit2
   gitfs: