docs(ref): Integrate link to unexpected_cfgs lint

Author: epage

src/doc/src/reference/build-scripts.md

@@ -259,10 +259,9 @@ identifier, the value should be a string.
 ### `cargo::rustc-check-cfg=CHECK_CFG` {#rustc-check-cfg}
 
 Add to the list of expected config names and values that is used when checking
-the _reachable_ cfg expressions.
+the _reachable_ cfg expressions with the [`unexpected_cfgs`][unexpected-cfgs] lint.
 
 For details on the syntax of `CHECK_CFG`, see `rustc` [`--check-cfg` flag][option-check-cfg].
-See also the [`unexpected_cfgs`][unexpected-cfgs] lint.
 
 > Note: `cargo:rustc-check-cfg` (single-colon) can be used if your MSRV is below Rust 1.77