fixing path on push command documentation description

lib/cocoapods/command/push.rb

@@ -10,7 +10,7 @@ module Pod
 
     Validates NAME.podspec or `*.podspec' in the current working dir, creates
     a directory and version folder for the pod in the local copy of 
-    REPO (./cocoapods/[REPO]), copies the podspec file into the version directory,
+    REPO (~/.cocoapods/[REPO]), copies the podspec file into the version directory,
     and finally it pushes REPO to its remote.}
       end