Fix markdown link in changelog

Author: aDotInTheVoid

CHANGELOG.md

@@ -6,7 +6,7 @@ debug printing to how they're written in source-code. For example
 `#[attr = Repr([ReprC, ReprInt(SignedInt(I8))])])` would now be represented as 
 `#[repr(C,i8)]` ((rust#138018)[https://github.com/rust-lang/rust/pull/138018]). 
 
-This somewhat undoes (v0.36.0)[#v0.36.0].
+This somewhat undoes [v0.36.0](#v0.36.0).
 
 No changes were made to the schema (i.e. the public api for this crate is
 unchanged), but the format version has been bumped, as this may effect consuming