chore: fix typo

Naturalclar · Naturalclar · commit 7bda984de6b7 · 2020-01-09T00:36:46.000+09:00
diff --git a/README.md b/README.md
@@ -76,7 +76,7 @@ Run the following commands
       implementation project(':@react-native-community_progress-bar-android')
   	```
 
-</detail>
+</details>
 
 ## Usage
 ```jsx
