Add missing #[pallet::constant] annotations to pallets (#9367)

fixing #9306

substrate/frame/authorship/src/lib.rs

@@ -137,6 +137,7 @@ pub mod pallet {
 		/// The number of blocks back we should accept uncles.
 		/// This means that we will deal with uncle-parents that are
 		/// `UncleGenerations + 1` before `now`.
+		#[pallet::constant]
 		type UncleGenerations: Get<Self::BlockNumber>;
 		/// A filter for uncles within a block. This is for implementing
 		/// further constraints on what uncles can be included, other than their ancestry.