Minor clarification to the fhirAuthorization param (fixes #252) (#422)

Author: kpshek

docs/specification/1.0.md

@@ -300,7 +300,7 @@ With CDS Hooks, if the EHR wants to provide the CDS Service direct access to FHI
 
 #### Passing the Access Token to the CDS Service
 
-The access token is specified in the CDS Service request via the OPTIONAL `fhirAuthorization` request parameter. This parameter is an object that contains both the access token as well as other related information as specified below.  If the EHR chooses not to pass along an access token, the `fhirAuthorization` parameter is omitted.
+The access token is specified in the CDS Service request via the `fhirAuthorization` request parameter. This parameter is an object that contains both the access token as well as other related information as specified below.  If the EHR chooses not to pass along an access token, the `fhirAuthorization` parameter is omitted.
 
 Field | Optionality | Type | Description
 ----- | ----- | ----- | -----------