docs: note the Unraid App data path in the upgrade guide, fix the Sankey caption version

Author: mbolli

README.md

@@ -17,7 +17,7 @@ nfsen-ng is a modern, in-place replacement for the ageing [NfSen](http://nfsen.s
 ![nfsen-ng dashboard overview, light and dark](https://raw.githubusercontent.com/mbolli/nfsen-ng/master/book/src/images/00-page-graphs.png)
 
 ![nfsen-ng Sankey diagram visualizing src IP -> dst port -> dst IP traffic flow, light and dark](https://raw.githubusercontent.com/mbolli/nfsen-ng/master/book/src/images/guide-sankey-ports.png)
-*Sankey traffic-flow diagram with the optional destination-port column, available since v1.0.0-beta.1.*
+*Sankey traffic-flow diagram, available since v1.0.0-beta.1, with the optional destination-port column added in v1.0.0-beta.2.*
 
 ## Quick start
 

book/src/deployment/upgrading.md

@@ -57,6 +57,11 @@ fit together.
   new volume once — e.g. `docker run --rm -v rrd-data:/old -v nfsen-data:/new
   alpine cp -a /old/. /new/rrd/` — or just rebuild them with **Force Rescan**.
   See [State & persistence](configuration.md#state--persistence).
+- **Unraid template users**: the UI template gained a matching **App data** path
+  (`/var/lib/nfsen-ng`, defaulting to `/mnt/user/appdata/nfsen-ng-data`) in
+  v1.0.0-beta.3. An install created before that has no such mapping, so add it
+  when you update the container, otherwise the RRD database, preferences, and
+  alert rules are recreated empty on every image update.
 
 ## Migration steps