fix typo

Naoki Ainoya · Naoki Ainoya · commit a1be5b320691 · 2019-11-28T14:17:00.000+09:00
diff --git a/README.md b/README.md
@@ -1,7 +1,7 @@
 Siro
 =======
 
-Made posting slack easy
+Made posting slack messages easy
 
 ![](https://i.gyazo.com/48bb9669f10925464b3a7fe19bce14d2.gif)
 
