Update task_processing to 1.3.4 for watch backoff

This includes Yelp/task_processing#225, which
should add some backoff to watch restarts to avoid slamming the
apiserver

Author: nemacysts

requirements.txt

@@ -80,7 +80,7 @@ setuptools==65.5.1
 six==1.15.0
 sshpubkeys==3.1.0
 stack-data==0.6.2
-task-processing==1.3.3
+task-processing==1.3.4
 traitlets==5.0.0
 Twisted==22.10.0
 typing-extensions==4.5.0