Update docs/release-notes/release-notes-0.9.11.md

Co-authored-by: Marnix <[email protected]>

docs/release-notes/release-notes-0.9.11.md

@@ -45,7 +45,7 @@ Note that currently only Python 3.8, 3.9, 3.10 and 3.11 are supported, not Pytho
 
 ### Performance improvements
 
-Lots of performance improvements made in wallet code that makes big impact especially with old wallets, with a lots of transaction history (in extreme cases time needed for some operations was improved from 40+ minutes to around 10 seconds).
+Lots of performance improvements made in wallet code that makes big impact especially with old wallets, with a lots of transaction history (in extreme cases, the time needed for some operations was improved from 40+ minutes to around 10 seconds).
 
 This involves caching some computed data in wallet, for cases when if there is some bug with this discovered, new configuration option `wallet_caching_disabled` is added to `joinmarket.cfg`, which allows to disable it when syncing the wallet.