Corrected a typo in Subscription
<menu name="Client mode">
<item name="Client usage" href="client.html" />
- <item name="Subcsription" href="client_subscription.html" />
+ <item name="Subscription" href="client_subscription.html" />
<item name="Introspection" href="introspection.html" />
<item name="Runtime Classes" href="runtimeclasses.html" />
</menu>
