docs(unstable): Link the nightly unstable page, not a specific feature

Author: epage

src/doc/src/reference/unstable.md

@@ -57,7 +57,7 @@ For the latest nightly, see the [nightly version] of this page.
 [config file]: config.md
 [nightly channel]: ../../book/appendix-07-nightly-rust.html
 [stabilized]: https://doc.crates.io/contrib/process/unstable.html#stabilization
-[nightly version]: https://doc.rust-lang.org/nightly/cargo/reference/unstable.html#script
+[nightly version]: https://doc.rust-lang.org/nightly/cargo/reference/unstable.html
 
 ## List of unstable features