fix some 404 links

these experimental classes were removed from Scala 3.5.0

Author: SethTisue

blog/_posts/2022-09-05-scala-3.2.0-released.md

@@ -117,8 +117,8 @@ The `-Vprofile` option family is useful for trouble-spotting long compile times.
 
 The following new APIs were introduced to the language and currently can be used in experimental code. We are looking forward to user feedback before we decide to stabilise them.
 
-- [`scala.annotation.MainAnnotation`](https://scala-lang.org/api/3.x/scala/annotation/MainAnnotation.html#) - the annotation that can be used to define custom entry points to the application
-- [`scala.annotation.newMain`](https://scala-lang.org/api/3.x/scala/annotation/newMain.html#) - new implementation of `@main` annotation. It is planned to replace it in the future
+- [`scala.annotation.MainAnnotation`](https://scala-lang.org/api/3.3.3/scala/annotation/MainAnnotation.html#) - the annotation that can be used to define custom entry points to the application
+- [`scala.annotation.newMain`](https://scala-lang.org/api/3.3.3/scala/annotation/newMain.html#) - new implementation of `@main` annotation. It is planned to replace it in the future
 - [`scala.util.TupledFunction`](https://scala-lang.org/api/3.x/scala/util/TupledFunction.html#) - the typeclass allowing to abstract over function arities
 
 ## Stabilised APIs