Remove unnecessary requirements language from discovery example

Author: dennispatterson

docs/specification/current.md

@@ -44,7 +44,7 @@ A CDS Service provider SHALL expose its Discovery endpoint at"
 ```
 ### HTTP Request
 
-The discovery endpoint SHALL always be available at `{baseUrl}/cds-services`. For example, if the `baseUrl` is https://example.com, the CDS Client MAY invoke:
+The discovery endpoint SHALL always be available at `{baseUrl}/cds-services`. For example, if the `baseUrl` is https://example.com, the CDS Client can retrieve the list of CDS Services by invoking:
 
 `GET https://example.com/cds-services`