Update troubleshooting.rst

docs/troubleshooting.rst

@@ -28,8 +28,8 @@ Where are my log files?
 -----------------------
 
 You can find the various services log files under
-  /var/log/celery
+  * /var/log/celery
-  /var/log/gunicorn
+  * /var/log/gunicorn
-  /var/log/socketio
+  * /var/log/socketio
 
-You may also want to inspect the main treeherder log file ~/treeherder-service/treeherder.log
+You may also want to inspect the main treeherder log file ~/treeherder-service/treeherder.log