chore(docs): Restore missing doc for codec-crate attribute

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "parity-scale-codec"
 description = "SCALE - Simple Concatenating Aggregated Little Endians"
-version = "3.6.9"
+version = "3.6.10"
 authors = ["Parity Technologies <[email protected]>"]
 license = "Apache-2.0"
 repository = "https://github.com/paritytech/parity-scale-codec"
@@ -12,7 +12,7 @@ rust-version = "1.60.0"
 [dependencies]
 arrayvec = { version = "0.7", default-features = false }
 serde = { version = "1.0.193", default-features = false, optional = true }
-parity-scale-codec-derive = { path = "derive", version = ">= 3.6.9", default-features = false, optional = true }
+parity-scale-codec-derive = { path = "derive", version = ">= 3.6.10", default-features = false, optional = true }
 bitvec = { version = "1", default-features = false, features = [ "alloc" ], optional = true }
 bytes = { version = "1", default-features = false, optional = true }
 byte-slice-cast = { version = "1.2.2", default-features = false }

README.md

@@ -226,6 +226,9 @@ The derive implementation supports the following attributes:
   trait derivation of the corresponding trait, e.g. T in
   `codec(encode_bound(skip_type_params(T)))` will not contain a `Encode` trait bound while
   `Encode` is being derived for the annotated type.
+- `codec(crate = path::to::crate)`: Specify a path to the parity-scale-codec crate instance to use
+  when referring to Codec APIs from generated code. This is normally only applicable when invoking
+  re-exported Codec derives from a public macro in a different crate.
 
 ## Known issues
 

derive/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "parity-scale-codec-derive"
 description = "Serialization and deserialization derive macro for Parity SCALE Codec"
-version = "3.6.9"
+version = "3.6.10"
 authors = ["Parity Technologies <[email protected]>"]
 license = "Apache-2.0"
 edition = "2021"