upnp/inc/upnp: Fix docstring typo
@@ -998,7 +998,7 @@ EXPORT_SPEC int UpnpRegisterClient(
* \brief Unregisters a control point application, unsubscribing all active
* subscriptions.
*
- * This function unregisters a client registered with UpnpRegisterclient or
+ * This function unregisters a client registered with UpnpRegisterClient or
* UpnpRegisterclient2. After this call, the \b UpnpClient_Handle is no longer
* valid. The UPnP Library generates no more callbacks after this function
* returns.
