Update documentation link cargo.toml vs cargo.lock

Rust.gitignore

@@ -3,7 +3,7 @@
 /target/
 
 # Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
-# More information here http://doc.crates.io/guide.html#cargotoml-vs-cargolock
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
 Cargo.lock
 
 # These are backup files generated by rustfmt