chore: update wording of test

Author: abarker-launchdarkly

__tests__/translateTrackingEventDetails.test.ts

@@ -8,7 +8,7 @@ it('returns undefined if details only contains value', () => {
   expect(translateTrackingEventDetails({ value: 12345 })).toBeUndefined();
 });
 
-it('returns object without value attribute', () => {
+it('returns an object without the value attribute', () => {
   expect(translateTrackingEventDetails({
     value: 12345,
     key1: 'val1',