Update cws.conviva.com tracking method

Update cws.conviva.com tracking method

As shown at https://github.com/StevenBlack/hosts/pull/587 cws.conviva.com is already present.
The problem is that the conviva.com tracking method has changed so the blacklist should be changed.

Previously, cws.conviva.com tracked non-generic by cws.conviva.com.
This has changed to unique, specific via be43a77aab46b0546578grgrtgr3d4ba6506d488.cws.conviva.com (example).

Various programs like Ad-blockers have the possibility to use wildcards.
In order to keep it so generally working, it seems wise to block the entire domain.

I tested it with Horizon (local TV service provider), and even though I opted for opt-out of analitics viewing data, it is still being tracked.
Therefore this one should be added immediately.