Update setup.md

I have a problem with installation on ubuntu

Author: gad969

mongoose-os/quickstart/setup.md

@@ -32,7 +32,7 @@ managing device, provisioning device on cloud services, and so on.
 | --- | ------------------- |
 | Windows | Create `C:\mos` folder. Right-click on this [mos.exe](https://mongoose-os.com/downloads/mos-release/win/mos.exe) link,  choose "Save link as", save `mos.exe` into the `C:\mos` folder. Double-click on `mos.exe` to start a Web UI. If it does not start, open command prompt, enter <code>cd c:\mos</code> and then <code>mos --start-webview=false</code>|
 |  MacOS | First, [install brew utility](https://brew.sh/). Then execute the following to start a Web UI: <pre>brew tap cesanta/mos<br>brew install mos<br>mos</pre> |
-|  Ubuntu Linux | Note: Linux version starts UI in a browser window. <pre>sudo add-apt-repository ppa:mongoose-os/mos<br>sudo apt-get update<br>sudo apt-get install mos<br>mos</pre> |
+|  Ubuntu Linux | Note: Linux version starts UI in a browser window. <pre>sudo add-apt-repository ppa:mongoose-os/mos<br>sudo apt-get update<br>sudo apt-get install mos-latest<br>mos</pre> |
 |  Arch Linux | Note: Linux version start UI in a browser window. <pre>git clone https://github.com/mongoose-os/mos<br>cd mos-tool/mos/archlinux_pkgbuild/mos-release<br>makepkg<br>pacman -U ./mos-*.tar.xz<br>mos</pre> |
 |  Generic MacOS/Linux | Note: starts UI in a browser window. <pre>curl -fsSL https://mongoose-os.com/downloads/mos/install.sh \| /bin/bash<br>mos</pre> |