Fixed for sbo repository

Signed-off-by: Dimitris Zlatanidis <d.zlatanidis@gmail.com>

slpkg/update_repositories.py

@@ -62,6 +62,10 @@ class UpdateRepositories(Configs):  # pylint: disable=[R0902]
         """
         if self.gpg_verification:
             mirror: str = self.repos.repositories[repo]['mirror_changelog']
+
+            if repo == self.repos.sbo_repo_name:
+                mirror: str = 'https://www.slackbuilds.org/'
+
             gpg_key: str = f'{mirror}GPG-KEY'
             gpg_command: str = 'gpg --fetch-key'
             process: str = ''