Unattended upgrade does not work

[jecassis]

The unattended upgrade in the Debian package does not find distribution repository.

For the following entry in sources.list:

deb https://releases.algorand.com/deb/ indexer main

The correct distribution is indexer and not stable like in go-algorand.

The file 52algorand-indexer-upgrades should read:

Unattended-Upgrade::Allowed-Origins {
  "Algorand:indexer";
};

After doing so unattended-upgrades finds algorand-indexer as seen in the log below:

INFO Allowed origins are: ..., o=Algorand,a=stable, o=Algorand,a=indexer
INFO Packages that will be upgraded: algorand-indexer