update readme more

README.md

@@ -916,7 +916,6 @@ AppleHealthKit.getSleepSamples(options, (err: Object, samples: Array<Object>) =>
 ___
 
 #### **`saveMindfulSession`**
-saveMindfulSession
 
 each mindfulness sample represents a period of time with a startDate and an endDate.
 the options must contain `startDate` and `endDate`
@@ -926,6 +925,14 @@ let options = {
     startDate: (new Date(2016,10,1)).toISOString(),   // required
     endDate: (new Date()).toISOString(),        // optional; default now
 };
+
+AppleHealthKit.saveMindfulSession({
+  startDate: startDate,
+  endDate: endDate
+}, (err, res) => {
+  if (err) return console.log(err)
+  console.log('Mindful session saved')
+});
 ```