Ensure that git commits the changes to pubring.gpg when running blackbox_removeadmin
Ensure that git commits the changes to pubring.gpg when running blackbox_removeadmin

This relates to https://github.com/StackExchange/blackbox/issues/247 where it has been observed that the blackbox_removeadmin script prompts the user to run an incorrect command after running blackbox_removeadmin. This commit simply adds pubring.gpg to the list of files to be committed.

StackExchange/blackbox,unixorn/blackbox,StackExchange/blackbox,unixorn/blackbox