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 MessageHeader must have:
1. An event code of “notification-admit”

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 MessageHeader must have:
1\. An event code of “notification-admit”\.