Update the minimal template to stable2412 (#21)

This synchronizes the template to the stable2412 branch.

---------

Signed-off-by: Iulian Barbu <iulian.barbu@parity.io>
Co-authored-by: iulianbarbu <14218860+iulianbarbu@users.noreply.github.com>
Co-authored-by: Iulian Barbu <iulian.barbu@parity.io>

pallets/template/README.md

@@ -2,4 +2,4 @@
 
 ## Release
 
-Polkadot SDK stable2409
+Polkadot SDK Stable 2412

pallets/template/src/lib.rs

@@ -5,6 +5,7 @@
 
 #![cfg_attr(not(feature = "std"), no_std)]
 
+use frame::prelude::*;
 use polkadot_sdk::polkadot_sdk_frame as frame;
 
 // Re-export all pallet parts, this is needed to properly import the pallet into the runtime.
@@ -19,4 +20,7 @@ pub mod pallet {
 
 	#[pallet::pallet]
 	pub struct Pallet<T>(_);
+
+	#[pallet::storage]
+	pub type Value<T> = StorageValue<Value = u32>;
 }