Fix broken 404 https://tabnine.com/blog/deep link in README

[Dima-369]

https://tabnine.com/blog/deep now 404s.

Not quite sure which the correct link is though.

[karta0807913]

I think now it's here https://www.tabnine.com/blog/.

[tillydray]

I searched their blog for "deep" and found "deep model" so then I searched for "deep model" and this is the only result I got https://www.tabnine.com/blog/tabnine-memory-and-cpu-usage/. So I'm guessing that's the specific info that the repo author was trying to link to

[TommyX12]

Thanks, changed the readme.