misc/examples: fixed typo in kemi js example

(cherry picked from commit 0e84e7b13fa934f47d1c68a2b040109db473e082)

misc/examples/kemi/kamailio-basic-kemi-jsdt.js

@@ -335,7 +335,7 @@ function ksr_route_sipout()
 
 	KSR.hdr.append_hf("P-Hint: outbound\r\n");
 	ksr_route_relay();
-	KSR.xexit();;
+	KSR.x.exit();
 }
 
 // Manage outgoing branches