update changelog

CHANGELOG

@@ -45,6 +45,8 @@ v 8.1.0 (unreleased)
   - Fix position of hamburger in header for smaller screens (Han Loong Liauw)
   - Fix bug where Emojis in Markdown would truncate remaining text (Sakata Sinji)
   - Persist filters when sorting on admin user page (Jerry Lukins)
+  - Add spellcheck=false to certain input fields
+  - Invalidate stored service password if the endpoint URL is changed
 v 8.0.4
   - Fix Message-ID header to be RFC 2111-compliant to prevent e-mails being dropped (Stan Hu)