Merge Joinmarket-Org/joinmarket-clientserver#1556: Update release-notes-0.9.10.md

c9c4648ee1 Update release-notes-0.9.10.md (Bitcoin Belly Button)

Pull request description:

  Added instructions on how to recreate the joinmarket.cfg when upgrading,

Top commit has no ACKs.

Tree-SHA512: 2fb03e049972371514ba4e58b71bf3b55967f2d0f338c7bbadec1df33beb70c5605b403dc2962c908b931abfd0972be115b216d45b8f0d329a0c3323f6c00277

docs/release-notes/release-notes-0.9.10.md

@@ -12,7 +12,7 @@ Upgrading
 
 To upgrade:
 
-*Reminder: always back up and recreate your joinmarket.cfg file when doing the upgrade; this is to make sure you have the new default settings.*
+*Reminder: always back up and recreate your joinmarket.cfg file when doing the upgrade; this is to make sure you have the new default settings. In order to recreate it, rename the old joinmarket.cfg and run 'python3 wallet-tool.py generate' from the scripts folder.*
 
 (If you are upgrading from a version pre-0.7.0 please read the "Upgrading" section in [the 0.7.0 release notes](https://github.com/JoinMarket-Org/joinmarket-clientserver/blob/master/docs/release-notes/release-notes-0.7.0.md).)