Leave a blank line between crate docs and rkyv internal documentation

Author: LukeMathWalker

src/rustdoc-json-types/lib.rs

@@ -31,6 +31,7 @@
 //! [1]: https://rust-lang.zulipchat.com/#narrow/channel/266220-t-rustdoc/topic/rustc-hash.20and.20performance.20of.20rustdoc-types/near/474855731
 //! [2]: https://crates.io/crates/rustc-hash
 //! [3]: https://rkyv.org/zero-copy-deserialization.html
+
 // # On `rkyv` Derives
 //
 // In most cases, it's enough to add `#[derive(rkyv::Archive, rkyv::Serialize, rkyv::Deserialize)]`