MODULES-11639: Fix syntax for Apt::Keyring requirement in shared examples

Author: span786

spec/shared_examples/repos.rb

@@ -45,7 +45,7 @@
             'src' => false
           },
           'keyring' => "#{key_path}/#{key_name}",
-          'require' => "Apt::Keyring[#{key_name}]"
+          'require' => "Apt::Keyring[#{key_name}]",
         )
       }