Readme.md in mina-1.2.3

- old
+ new

@@ -1,7 +1,7 @@
 # Mina Documentations
 
-Mina is a tool that exstends rake (think ruby's make) in order to create bash scripts which are then run on your servers.
+Mina is a tool that extends rake (think ruby's make) in order to create bash scripts which are then run on your servers.
 
 * [Getting started](getting_started.md)
 * [How Mina Works](how_mina_works.md)
 * [Migrating from 0.3.x to 1.0](migrating.md)
 * [Default Plugins](default_plugins.md)