renamed covid_symptom__define_dx_icd10

towards better support of PCR tests and results in different coding systems and EHR support.

#8
#13

cumulus_library_covid/covid_symptom/define_dx_icd10.sql

@@ -1,3 +1,3 @@
-create or replace view covid_symptom__define_dx as select * from (values
+create or replace view covid_symptom__define_dx_icd10 as select * from (values
 ('http://hl7.org/fhir/sid/icd-10-cm', 'U07.1', 'COVID-19')
 ) AS t (system, code, display) ;