Update coarse-parallel-processing-work-queue.md (#12402)

the file needs to have permission to be executed with the command:

CMD /usr/bin/amqp-consume --url=$BROKER_URL -q $QUEUE -c 1 /worker.py

from Dockerfile https://kubernetes.io/examples/application/job/rabbitmq/Dockerfile

content/en/docs/tasks/job/coarse-parallel-processing-work-queue.md

@@ -181,6 +181,12 @@ example program:
 
 {{< codenew language="python" file="application/job/rabbitmq/worker.py" >}}
 
+Give the script execution permission:
+
+```shell
+$ chmod +x worker.py
+```
+
 Now, build an image.  If you are working in the source
 tree, then change directory to `examples/job/work-queue-1`.
 Otherwise, make a temporary directory, change to it,