Correct specification.url entry

Author: fmckinney

xml/FHIR-us-carin-rtpbc.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <specification xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                gitUrl="https://github.com/HL7/carin-rtpbc" 
-               url="http://hl7.org/fhir/us/carin"
+               url="http://hl7.org/fhir/us/carin-rtpbc"
                ciUrl="http://build.fhir.org/ig/HL7/carin-rtpbc"
                defaultWorkgroup="pharm"
                defaultVersion="1.0.0"