Thanks @Falco that solved the issue for me!
Since Azure doesn’t allow specifying the version I ran ALTER EXTENSION vector UPDATE to update to the latest available version. The extension installs are specific to the database, so need to connect to the discourse database (not the default postgres db) to run the update statement.
Here’s how to check the current installed version and to update.
SELECT name, default_version, installed_version FROM pg_available_extensions WHERE name = 'vector';
