Fix warning in rustdoc job (#8159)

* Fix warning in rustdoc job

* More fixes

* Remove `build-rust-doc` job

Remove this job until upstream is fixed:
https://github.com/rust-lang/rust/issues/82284

* CI: temp. remove of the publishing job, no use of it w/o build

Co-authored-by: Denis P <denis.pisarev@parity.io>

substrate/client/cli/src/arg_enums.rs

@@ -170,7 +170,7 @@ impl Into<sc_service::config::RpcMethods> for RpcMethods {
 pub enum Database {
 	/// Facebooks RocksDB
 	RocksDb,
-	/// ParityDb. https://github.com/paritytech/parity-db/
+	/// ParityDb. <https://github.com/paritytech/parity-db/>
 	ParityDb,
 }