chore: bump spec version to 15

Author: saiintbrisson

runtime/src/lib.rs

@@ -38,7 +38,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
     spec_name: create_runtime_str!("torus-runtime"),
     impl_name: create_runtime_str!("torus-runtime"),
     authoring_version: 1,
-    spec_version: 14,
+    spec_version: 15,
     impl_version: 1,
     apis: apis::RUNTIME_API_VERSIONS,
     transaction_version: 1,