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

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

Author: anatoliykmetyuk

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

@@ -13,7 +13,7 @@ This release brings some last-minute polishings, clean-ups and changes before th
 Overall, more than [400 PRs](https://github.com/lampepfl/dotty/pulls?q=is%3Apr+is%3Aclosed+closed%3A%3E2020-12-02+sort%3Acomments-desc) were merged after the M3 release and until today! Read more below!
 
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-# Allow leading context parameters in extension methods
+# Allow secondary type parameter list in extension methods
 Type parameters on extensions can now be combined with type parameters on the methods themselves. E.g.:
 
 ```scala