manager: Add documentation for NewConnectedLine event.

The NewConnectedLine event has been added by commit fe7671f, but the
documentation was missing.

ASTERISK-26537 #close

Change-Id: I7fc331f18caa28492da9303e576f70884ca8c9e6

main/manager_channels.c

@@ -139,6 +139,17 @@
 			</see-also>
 		</managerEventInstance>
 	</managerEvent>
+	<managerEvent language="en_US" name="NewConnectedLine">
+		<managerEventInstance class="EVENT_FLAG_CALL">
+			<synopsis>Raised when a channel's connected line information is changed.</synopsis>
+			<syntax>
+				<channel_snapshot/>
+			</syntax>
+			<see-also>
+				<ref type="function">CONNECTEDLINE</ref>
+			</see-also>
+		</managerEventInstance>
+	</managerEvent>
 	<managerEvent language="en_US" name="NewAccountCode">
 		<managerEventInstance class="EVENT_FLAG_CALL">
 			<synopsis>Raised when a Channel's AccountCode is changed.</synopsis>