Update FHIR extension dependency version

Author: jkiddo

sushi-config.yaml

@@ -43,7 +43,7 @@ parameters:
   path-expansion-params: Parameters-expParam.json
 
 dependencies:
-  hl7.fhir.extensions.r5: 4.0.1
+  hl7.fhir.uv.extensions: 5.3.0-ballot-tc1
   hl7.fhir.uv.phd: 1.1.0
   hl7.fhir.uv.ipa: 1.0.0
   ihe.iti.mhd: 4.2.3