example typo (#9416)

* Think these types should be switched reading the doc.

* Update frame/support/procedural/src/lib.rs

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

substrate/frame/support/procedural/src/lib.rs

@@ -289,7 +289,7 @@ pub fn decl_storage(input: TokenStream) -> TokenStream {
 /// construct_runtime!(
 ///     pub enum Runtime where
 ///         Block = Block,
-///         NodeBlock = runtime::Block,
+///         NodeBlock = node::Block,
 ///         UncheckedExtrinsic = UncheckedExtrinsic
 ///     {
 ///         System: system::{Pallet, Call, Event<T>, Config<T>} = 0,