NRL-1049 decapitalise display values

Author: eesa456

layer/nrlf/core/constants.py

@@ -98,10 +98,10 @@ def coding_value(self):
         "display": "Clinical note",
     },
     Categories.DIAGNOSTIC_STUDIES_REPORT.value: {
-        "display": "Diagnostic Studies Report",
+        "display": "Diagnostic studies report",
     },
     Categories.DIAGNOSTIC_PROCEDURE.value: {
-        "display": "Diagnostic Procedure",
+        "display": "Diagnostic procedure",
     },
 }