Update file migration_group_export_import.py

migration_group_export_import.py

@@ -4,8 +4,9 @@ Exprot and Import a group from source(pilot) GitLab to new GitLab
 
 Usage: migration_group_export_import.py
 
-Author: Donghee Kang
-Email : donghee.kang@kit.edu
+Author: Donghee Kang<donghee.kang@kit.edu>
+        Felix Dörre<felix.doerre@kit.edu>
+
 """
 import gitlab
 import os