deploy => app-deploy in app-deploy examples

```
$ tsuru app-deploy
tsuru version 0.13.2.

ERROR: wrong number of arguments.

Usage: tsuru app-deploy [-a/--app <appname>] <file-or-dir-1> [file-or-dir-2] ... [file-or-dir-n]

Deploys set of files and/or directories to tsuru server. Some examples of calls are:

tsuru app-deploy .
tsuru app-deploy myfile.jar Procfile


Minimum # of arguments: 1
```