[xmppclient] Update examples rules for OH3 usage (#9643)
[xmppclient] Update examples rules for OH3 usage (#9643)

- Rename parameter 1 of "getActions" from "xmpp" to "xmppclient".
- Remove "getEvent()" as "receivedEvent" automatically contains the String since OH3.
paulianttila/openhab2,MikeJMajor/openhab2-addons-dlinksmarthome,paulianttila/openhab2,MikeJMajor/openhab2-addons-dlinksmarthome,MikeJMajor/openhab2-addons-dlinksmarthome,paulianttila/openhab2