Fix scaladoc section wording

Author: anatoliykmetyuk

docs/blog/_posts/2021-02-17-scala3-rc1.md

@@ -105,7 +105,7 @@ Results in:
 As the warning suggests, now you should write `Foo.apply` instead of `Foo`. See [Issue #6190](https://github.com/lampepfl/dotty/issues/6190) and [PR #7207](https://github.com/lampepfl/dotty/pull/7207) for discussion.
 
 # Settling on `scaladoc` as the documentation tool
-We have settled on using `scaladoc` as the documentation build tool. The obsolete `dotty-doc` (or `scala3-doc`) is removed in RC1. We have also removed all the Kotlin dependencies (Dokka, etc.) from scaladoc. For details, see [PR #11349](https://github.com/lampepfl/dotty/pull/11349). To read more about `scaladoc`, see [documentation](https://dotty.epfl.ch/docs/usage/scaladoc/index.html)
+We have settled on using the well-known `scaladoc` as a name for the documentation tool for Scala 3 (known previously as `scala3doc`).. The obsolete `dotty-doc` (or `scala3-doc`) is removed in RC1. We have also removed all the Kotlin dependencies (Dokka, etc.) from scaladoc. For details, see [PR #11349](https://github.com/lampepfl/dotty/pull/11349). To read more about `scaladoc`, see [documentation](https://dotty.epfl.ch/docs/usage/scaladoc/index.html)
 
 # Use `future` and `future-migration` to specify language versions after 3.0 in `-source`
 [PR #11355](https://github.com/lampepfl/dotty/pull/11355) changes the `-source` specifier for the Scala version(s) after 3.0 from `3.1` to `future`. I.e. it is now