Fix a catch class name

Summary: Now that we examine these in lint, this came up. There is no `ConduitException`; the class is `ConduitClientException`.

Test Plan: Lint.

Reviewers: vrana, chad

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D6158

src/workflow/ArcanistFeatureWorkflow.php

@@ -136,7 +136,7 @@ EOTEXT
               $command,
               $name);
           }
-        } catch (ConduitException $ex) {
+        } catch (ConduitClientException $ex) {
         }
       }
     }