docs(blog): set redaction-demo publish date to 2026-05-21

Author: ojongerius

site/src/content/docs/blog/unified-chain-redaction-demo.mdx

@@ -5,7 +5,7 @@ description: "How the Claude Code hook and MCP proxy write to the same auditable
 
 import { Aside } from '@astrojs/starlight/components';
 
-_Published 2026-05-17_ · **Series: Auditing AI Agents** · Part 2 of 3 · [← The audit boundary belongs outside the agent](/blog/daemon-process-separation/)
+_Published 2026-05-21_ · **Series: Auditing AI Agents** · Part 2 of 3 · [← The audit boundary belongs outside the agent](/blog/daemon-process-separation/)
 
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