docs(readme): remove duplicate content

README.md

@@ -2,9 +2,6 @@
 
 **zsh-abbr** is the zsh manager for **auto-expanding abbreviations** - text that when written in a terminal is replaced with other (typically longer) text. Inspired by fish shell.
 
-:::danger Heads Up
-v6 is coming, with breaking changes. If you do advanced configuration, read [the v5.x -> v6.x migration guide](https://v6.zsh-abbr.olets.dev/migrating-between-versions.html#upgrading-from-v5-to-v6) and/or read about [pinning v5.x](./installation.md).
-:::
 > [!IMPORTANT]  
 > v6 is coming, with breaking changes. If you do advanced configuration, read [the v5.x -> v6.x migration guide](https://v6.zsh-abbr.olets.dev/migrating-between-versions.html#upgrading-from-v5-to-v6) and/or read about [pinning v5.x](https://v5.zsh-abbr.olets.dev/installation.html).