flake does not provide attribute

Description

Running nix run "https://getfleek.dev/latest.tar.gz" -- update shows:

nix run "https://getfleek.dev/latest.tar.gz" -- update
...
 [i]  Updating flake sources
Everything up-to-date
error: flake '...' does not provide attribute 'apps.aarch64-darwin.fleek',

Fix

Update your flake templates with the latest version.

nix run "https://getfleek.dev/latest.tar.gz" -- write

Then run the update again:

nix run "https://getfleek.dev/latest.tar.gz" -- update

Now you can apply the changes:

nix run "https://getfleek.dev/latest.tar.gz" -- apply