Fix(switch): set default value (checked) (segmentio#932)

* fix(switch): set checked default value to false

* docs(switch): replace PropsTable source

Author: wangcch

docs/src/pages/components/switch.mdx

@@ -53,4 +53,4 @@ Use `e.target.checked` to get the latest value and update state accordingly.
 />
 ```
 
-<PropsTable of="SwitchControl" />
+<PropsTable of="Switch" />

src/switch/src/Switch.js

@@ -71,7 +71,7 @@ const Switch = memo(
       id,
       name,
       height = 16,
-      checked,
+      checked = false,
       onChange = noop,
       disabled = false,
       appearance = 'default',