Rollup merge of rust-lang#56691 - mishaker:fix_doc_install_broken_link, r=jonas-schievink

fix install broken link

solves rust-lang#56690

Author: kennytm

README.md

@@ -10,7 +10,7 @@ standard library, and documentation.
 
 Read ["Installation"] from [The Book].
 
-["Installation"]: https://doc.rust-lang.org/book/second-edition/ch01-01-installation.html
+["Installation"]: https://doc.rust-lang.org/book/ch01-01-installation.html
 [The Book]: https://doc.rust-lang.org/book/index.html
 
 ## Building from Source