Add missing metadata specs to crate manifests (#12221)

Some crates were missing repository or description specs, which are
required for publishing crates with cargo unleash.

substrate/bin/node/runtime/Cargo.toml

@@ -2,6 +2,7 @@
 name = "kitchensink-runtime"
 version = "3.0.0-dev"
 authors = ["Parity Technologies <admin@parity.io>"]
+description = "Substrate node kitchensink runtime."
 edition = "2021"
 build = "build.rs"
 license = "Apache-2.0"