Pin the hyperzine manifest to W6EqQbl9

The mystic reference has not yet been indexed with the manifest that
includes arweave-for-ao, so load that manifest directly. Blank
MANIFEST_TX_ID to return to reference resolution.

src/config.ts

@@ -5,6 +5,9 @@ export const BLOG_DEFAULT_DESCRIPTION =
   "A blog about cyberspace decentralization";
 export const BLOG_TWITTER_HANDLE = "";
 export const MANIFEST_REFERENCE_NAME = "mystic";
+// Pinned manifest. When set, the site loads this manifest instead of
+// resolving the reference. Blank it to go back to reference resolution.
+export const MANIFEST_TX_ID = "W6EqQbl9kdM7nqiqhCclZnZEQJs0Rr7sDz-N2ou4TLM";
 export const ARWEAVE_GATEWAY = "https://arweave.net";
 
 export const AO_URL = "https://push-1.forward.computer";