fix typo constant

RCTAppleHealthKit/RCTAppleHealthKit+Utils.m

@@ -243,7 +243,7 @@
     if([unitString isEqualToString:@"mmolPerL"]){
         theUnit = [[HKUnit moleUnitWithMetricPrefix:HKMetricPrefixMilli molarMass:HKUnitMolarMassBloodGlucose] unitDividedByUnit:[HKUnit literUnit]];
     }
-    if([unitString isEqualToString:@"mgPerL"]){
+    if([unitString isEqualToString:@"mgPerdL"]){
         theUnit = [HKUnit unitFromString:@"mg/dL"];
     }
 

constants.js

@@ -48,7 +48,7 @@ const UNITS = {
 	celsius: 'celsius',
 	mmhg: 'mmhg',
 	mmolPerL: 'mmolPerL',
-	mgPerL: 'mgPerL',
+	mgPerdL: 'mgPerdL',
 };