Fix typos (home-assistant#3419)

Author: cgarwood

source/_components/switch.zha.markdown

@@ -1,7 +1,7 @@
 ---
 layout: page
 title: "ZigBee Home Automation Switch"
-description: "Instructions how to setup ZigBee Home Automation switches within Home Assistant."
+description: "Instructions on how to setup ZigBee Home Automation switches within Home Assistant."
 date: 2017-02-22 00:00
 sidebar: true
 comments: false
@@ -12,4 +12,4 @@ ha_category: Switch
 ha_iot_class: "Local Polling"
 ---
 
-To get your ZigBee switches working with Home Assistant, follow theminstructions for the general [ZigBee Home Automation component](/components/zha/).
+To get your ZigBee switches working with Home Assistant, follow the instructions for the general [ZigBee Home Automation component](/components/zha/).