Update servicenow-integration.rst

Added troubleshooting line for saving incident rules

Author: cmillane

sp-oncall/spoc-integrations/servicenow-integration.rst

@@ -194,6 +194,8 @@ automatically.
 
 .. image:: /_images/spoc/VOSN_conditions.png
 
+If you experience any issues saving Incident Rules or Custom Fields, please ensure that your :guilabel:`Application Scope` is presently set to :guilabel:`Splunk > VictorOps`.
+
 Manually send incidents from ServiceNow to Splunk On-Call
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