Improve wording for the Widen section

Co-authored-by: Nicolas Stucki <[email protected]>

Author: anatoliykmetyuk

docs/blog/_posts/2021-03-31-scala3-rc2.md

@@ -40,7 +40,7 @@ In PR [#11671](https://github.com/lampepfl/dotty/pull/11671), we now treat the `
 The following are some notable metaprogramming changes included into this release:
 
 - Add quotes.Type.valueOfConstant [#11715](https://github.com/lampepfl/dotty/pull/11715)
-- Try to remove compiletime.Widen [#11569](https://github.com/lampepfl/dotty/pull/11569)
+- Remove compiletime.Widen [#11569](https://github.com/lampepfl/dotty/pull/11569)
 - Add -Xcheck-macros scalac option [#11655](https://github.com/lampepfl/dotty/pull/11655)
 - Add reflect Symbol.info and ClassInfo [#11664](https://github.com/lampepfl/dotty/pull/11664)