activity: `itemid` works instead of `resourceid`

[Salipa-Gurung]

For activity endpoint, kql query works with itemid i.e./v1beta1/extensions/org.libregraph/activities?kql=itemid:{itemid} but according to documentation it must be kql=resourceid as /v1beta1/extensions/org.libregraph/activities?kql=resourceid:{resourceid}