docs(spec): regenerate the export reference page after the release-line wording fix

Co-authored-by: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Rjy9MeetSfq34PKn81CRiN

Author: claude

content/docs/references/api/export.mdx

@@ -18,7 +18,7 @@ The export the platform serves is the synchronous streaming door
 the `ExportFormat` formats. The asynchronous export-job API that used to be
 declared here (export jobs, their progress / download / list shapes,
 scheduled exports and `ExportApiContracts`) was never served by any route and
-was removed in @objectstack/spec 18 (ADR-0049 enforce-or-remove); a recurring
+was removed in @objectstack/spec 17 (ADR-0049 enforce-or-remove); a recurring
 export is a `Job` whose handler you write.
 
 <Callout type="info">