Docs: Link to 1password generator is 404'ing

[dsernst]

Have you experienced this bug with the latest version of the template?

Yes

Steps to Reproduce

The Readme links to a 1password page that is 404'ing:

Spot in readme:

indie-stack/README.md

Line 108 in f9cea84

If you don't have openssl installed, you can also use [1password](https://1password.com/generate-password) to generate a random secret, just replace `$(openssl rand -hex 32)` with the generated secret.

404'ing URL: https://1password.com/generate-password

Expected Behavior

Seems like it meant to link to some web app to generate a random hex string.

Actual Behavior