fix: update adorable api to api.hello-avatar.com

[wipash]

Resolves #4777

The Adorable.io avatar API has been closed down: itsthatguy/avatars-api-middleware#108 (comment)

This PR switches the URL to https://api.hello-avatar.com/adorables/ to immediately get the avatars working again.
See: itsthatguy/avatars-api-middleware#108 (comment)

[CLAassistant]

All committers have signed the CLA.

[asbiin]

I love it!
Could you also create a database update to fix all existing adorable urls?
If you don't know how, I can help.

[wipash]

Sure thing. I don't know how, but I'll try it tonight.

[wipash]

Okay! The migration is working in homestead. Is this the right approach?

[asbiin]

Thank you @wipash !

[wipash]

Awesome! Thank you so much @asbiin for being so kind and welcoming, even though this was a tiny change. Contributing for the first time to an open project like this is pretty daunting, but you made the experience feel very friendly.

[djaiss]

@asbiin the hello-avatar api seems down. Can you confirm?

[asbiin]

@djaiss no, it's working well:

[github-actions]

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