Update Beta release notes doc link for 152

Author: rvandermeulen

app/controllers/relnotes_doc.php

@@ -3,7 +3,7 @@
 declare(strict_types=1);
 
 // Link to the current Release Notes draft doc. Update that link every cycle.
-$doc = 'https://docs.google.com/document/d/1zNeBR5IwlMp2Hi5WItwY33TekGwbPcGq5vqWyeZ6h98/edit?usp=sharing';
+$doc = 'https://docs.google.com/document/d/1ZQT0UWHkITXrZ9_CQ8Bwv184i_ImzMPcggP7BCTxpVo/edit?usp=sharing';
 
 header("Location: $doc", true, 302);
 exit;