README: update PPA instructions for mraa2
@@ -80,7 +80,7 @@ https://launchpad.net/~mraa/+archive/ubuntu/mraa
```bash
sudo add-apt-repository ppa:mraa/mraa
sudo apt-get update
-sudo apt-get install libmraa1 libmraa-dev libmraa-java python-mraa python3-mraa node-mraa mraa-tools
+sudo apt-get install libmraa2 libmraa-dev libmraa-java python-mraa python3-mraa node-mraa mraa-tools
```
Running MRAA tools or applications on Ubuntu systems requires elevated permissions
