Update Go wiki hyperlink (#119)

Author: pellared

README.md

@@ -24,7 +24,7 @@ The generics (type parameters) make the usage type-safe.
 
 The library is [extensible](#extensibility) by design.
 
-> In general, [avoid using assertion libraries](https://github.com/golang/go/wiki/TestComments#assert-libraries).
+> In general, [avoid using assertion libraries](https://go.dev/wiki/TestComments#assert-libraries).
 > Use this library if you still have a preference to use one.
 > Consider using [`github.com/google/go-cmp`](https://github.com/google/go-cmp)
 > and writing custom helpers instead.