Point documentation links to docs.rs instead of docs.serde.rs

Cargo.toml

@@ -4,7 +4,7 @@ version = "0.11.8" # remember to update html_root_url
 authors = ["David Tolnay <dtolnay@gmail.com>"]
 categories = ["encoding", "no-std"]
 description = "Optimized handling of `&[u8]` and `Vec<u8>` for Serde"
-documentation = "https://docs.serde.rs/serde_bytes/"
+documentation = "https://docs.rs/serde_bytes"
 edition = "2018"
 keywords = ["serde", "serialization", "no_std", "bytes"]
 license = "MIT OR Apache-2.0"