docs: update release notes

Author: horriblename

docs/manual/release-notes/rl-0.9.md

@@ -207,4 +207,8 @@ https://github.com/gorbit99/codewindow.nvim
 
 - Changed `withRuby` to not be enabled by default
 
+[horriblename](https://github.com/horriblename):
+
+- Ignore terminals by default in spell-checking
+
 <!-- vim: set textwidth=80: -->