Coverage badge broken in repo readme

[jedrazb]

As in the title, the coverage badge seems to be broken, clicking the "Coverage" link gives 404:

[jedrazb]

@vim345 I see you were doing some work on coverage badge, is that expected for now?

[vim345]

@jedrazb Yes. Thanks for flagging it. I had disabled the configs, but I forgot to remove the reference point from README. I have fixed the configs in this PR: #405