fix: change check to governance (#933)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Refactor**
- Updated origin verification to utilize
`T::GovernanceOrigin::ensure_origin` for enhanced control flow and
security.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

pallets/thea-executor/src/lib.rs

@@ -353,7 +353,7 @@ pub mod pallet {
 			asset_id: u128,
 			decimal: u8,
 		) -> DispatchResult {
-			ensure_root(origin)?;
+			T::GovernanceOrigin::ensure_origin(origin)?;
 			let metadata = AssetMetadata::new(decimal).ok_or(Error::<T>::InvalidDecimal)?;
 			<Metadata<T>>::insert(asset_id, metadata);
 			Self::deposit_event(Event::<T>::AssetMetadataSet(metadata));

runtimes/mainnet/src/lib.rs

@@ -122,7 +122,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	// and set impl_version to 0. If only runtime
 	// implementation changes and behavior does not, then leave spec_version as
 	// is and increment impl_version.
-	spec_version: 335,
+	spec_version: 336,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 2,