Bump bulletin-westend spec_version to 1_000_006 (#228)

* Bump bulletin-westend spec_version to 1_000_004

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Update spec_version to 1_000_006

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: Karol Kokoszka <karol@parity.io>

Author: 3 people

runtimes/bulletin-westend/src/lib.rs

@@ -184,7 +184,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: alloc::borrow::Cow::Borrowed("bulletin-westend"),
 	impl_name: alloc::borrow::Cow::Borrowed("bulletin-westend"),
 	authoring_version: 1,
-	spec_version: 1_000_003,
+	spec_version: 1_000_006,
 	impl_version: 1,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 1,