Update blog/_posts/2022-01-17-scala-3.1.1-released.md

Co-authored-by: Jamie Thompson <[email protected]>

Author: Kordyjan

blog/_posts/2022-01-17-scala-3.1.1-released.md

@@ -22,7 +22,7 @@ Scala 3.1.1 is the patch release focused on bug fixes. Although there are no new
   ```
 
   To know more see [PR #13662](https://github.com/lampepfl/dotty/pull/13662) and [related issue](https://github.com/lampepfl/dotty/issues/12955).
-- Mirrors can be correctly summoned for hierarchical sum types compiled by Scala 3.0.x. You can now safely create derived instances of type classes for the types defined in dependencies compiled with previous versions of the compiler. ([PR #14100](https://github.com/lampepfl/dotty/pull/14100)).
+- Mirrors can be correctly summoned for hierarchical sum types compiled by Scala 3.0.x. It is now safe to derive a type class for a type dependency that was compiled with a pre-3.1.0 compiler. ([PR #14100](https://github.com/lampepfl/dotty/pull/14100)).
 - Dual Scala 2/3 macros can be now declared in non-experimental scopes ([PR #13795](https://github.com/lampepfl/dotty/pull/13795)).
 - Scaladoc documentation has an improved UI.