Resolve linting errors

src/main/python/ddadevops/domain/provider_hetzner.py

@@ -12,15 +12,15 @@ class Hetzner(Validateable, CredentialMappingDefault):
         result = []
         result += self.__validate_is_not_empty__("hetzner_api_key")
         return result
-    
+
     def resources_from_package(self) -> Set[str]:
         return {"provider_registry.tf", "hetzner_provider.tf", "hetzner_mixin_vars.tf"}
-    
+
     def project_vars(self):
         return {
             "hetzner_api_key": self.hetzner_api_key
         }
-    
+
     @classmethod
     def get_mapping_default(cls) -> List[Dict[str, str]]:
-        return []
+        return []