Add 0.57.6 and 0.57.7 changelogs

[radeno]

No description provided.

[kelset]

Thank you so much for this @radeno - sadly I'm not sure we should merge this because @turnrye has created a script to generate it and it's a bit different from what you created. I think we both forgot about changelog for these versions, I'll ping him ASAP and if he's too busy I'll merge this :)

But srly, thank you :)

[radeno]

@kelset don't worry. I am happy that script exists :) Any more information about that script?

[kelset]

I'm going to do a PR with more info :)

[kelset]

Closing in favour of #73