service.rsr fix mistake

Author: dvjdjvu

doc/source/services.rst

@@ -132,7 +132,7 @@ The call to this method should be done within the service code::
     PythonService.mService.setAutoRestartService(True)
     
 Service auto-start
-~~~~~~~~~~~~~~~~~~~~
+~~~~~~~~~~~~~~~~~~
 
 To automatically start the service on boot, you need to add signals inside ``AndroidManifest.xml`` that Android sends to applications on boot. 
 Create file ``receivers.xml`` and write this code::