Update fingerprint footnote (#15478)

This was noted in
#8140 (comment)
that it appeared outdated, and indeed this was changed in
#6832.

Author: weihanglo

src/cargo/core/compiler/fingerprint/mod.rs

@@ -89,7 +89,7 @@
 //! `[lints]` table[^6]                        | ✓           |                     |                        |
 //! `[lints.rust.unexpected_cfgs.check-cfg]`   | ✓           |                     |                        |
 //!
-//! [^1]: Build script and bin dependencies are not included.
+//! [^1]: Bin dependencies are not included.
 //!
 //! [^3]: See below for details on mtime tracking.
 //!