fix(pkgrepo): Store keyring under appropiate name

salt/osmap.yaml

   key_url: '{{ salt_repo }}/{{ py_ver_repr or 'yum' }}/amazon/2/$basearch/{{ salt_release }}/{{ salt_repo_pubkey_filename }}'
 
 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: 'deb [signed-by=/usr/share/keyrings/{{ salt_repo_keyring_filename}} 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_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 }}'
         install_from_package: Null
 
 Raspbian:
-  pkgrepo: 'deb [signed-by=/usr/share/keyrings/salt-archive-keyring.gpg arch=armhf] {{ salt_repo }}/{{ py_ver_repr or 'py3' }}/{{ os_family_lower }}/{{ osmajorrelease }}/armhf/{{ salt_release }} {{ oscodename }} main'
+  pkgrepo: 'deb [signed-by=/usr/share/keyrings/{{ salt_repo_keyring_filename }} arch=armhf] {{ salt_repo }}/{{ py_ver_repr or 'py3' }}/{{ os_family_lower }}/{{ osmajorrelease }}/armhf/{{ salt_release }} {{ oscodename }} main'
   pkgrepo_keyring: '{{ salt_repo }}/{{ py_ver_repr or 'py3' }}/{{ os_family_lower }}/{{ osmajorrelease }}/armhf/{{ salt_release }}/{{ salt_repo_keyring_filename }}'
 
 SmartOS: