* Update input_select.markdown
I added an MQTT automation example similar to the one on the input_slider component page.
* Fixed Typo
Fixed "Exampleof" typo.
This adds documentation on how to use the input_select component
services and how to use it in a scene.
This is related to bug home-assistant/home-assistant#4673
Signed-off-by: Jan Losinski <losinski@wh2.tu-dresden.de>