Update README.md

Author: dongyuwei

README.md

@@ -31,6 +31,6 @@ see: https://github.com/dongyuwei/tiny_english_dictionary/blob/master/metro.conf
 2. RN's javascriptCore engine does not support `console.time` api. It can crash app on Android.
 3. [dawg-lookup](https://github.com/mckoss/dawg) is awesome, it can build trie from packed/serialized file quickly. But it does not support UTF-8 characters, so for 成语接龙, I need another trie data structure implementation, which is [node-ternary-search-trie](https://github.com/jakwings/node-ternary-search-trie), it's speedy.
 4. I use [Typo.js](https://github.com/cfinke/Typo.js/) to implement the spell-check feature.
-5. [flatbuff](https://github.com/google/flatbuffers) and [schemapack](https://github.com/phretaddin/schemapack) are awesome. I have tried them, but they are difficult to integrate with react native. RN does not has proper/easy way to consume binary file. Fix me if I'm wrong. I have tried https://github.com/jidibingren/FlatBuffers-ObjC in this branch https://github.com/dongyuwei/hallelujahIM/tree/flatbuffer, but the performance gain is not so good as using json. 
+5. [flatbuff](https://github.com/google/flatbuffers) and [schemapack](https://github.com/phretaddin/schemapack) are awesome. I have tried them, but they are difficult to integrate with react native. RN does not have proper/easy way to consume binary file. Fix me if I'm wrong. I have tried https://github.com/jidibingren/FlatBuffers-ObjC in this branch https://github.com/dongyuwei/hallelujahIM/tree/flatbuffer, but the performance gain is not so good as using json. 
 6. Using react-native to develop mobile app is really easy and fast, however you need to pay attention to app performance issue.