Merge pull request #6125 from azolotko/fix-link-to-soft-modifier

Fix a link to soft-modifier.md in other-new-features/opaques.md

Author: OlivierBlanvillain

docs/docs/reference/other-new-features/opaques.md

@@ -53,6 +53,6 @@ But the following operations would lead to type errors:
   l / l2                  // error: `/` is not a member fo Logarithm
 ```
 
-`opaque` is a [soft modifier](./soft-modifier.html).
+`opaque` is a [soft modifier](../soft-modifier.html).
 
-For more details, see [Scala SIP 35](https://docs.scala-lang.org/sips/opaque-types.html).
+For more details, see [Scala SIP 35](https://docs.scala-lang.org/sips/opaque-types.html).