Add missing periods

Existing Wording:

The following data-elements are mandatory (i.e data MUST be present) or must be supported if the data is present in the sending system (Must Support definition).

Each GraphDefinition must support:
1. The Da Vinci Notifications Must Support Extension

Proposed Wording:

The following data-elements are mandatory (i.e\. data MUST be present) or must be supported if the data is present in the sending system (Must Support definition)\.

Each GraphDefinition must support:
1\. The Da Vinci Notifications Must Support Extension\.