Broken link to README.md needs fixing on MDN

[SamB]

The URL https://github.com/mdn/browser-compat-data/README.md, which I found hidden on https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Disposition$edit in a way that leads me to suspect that it is also found on many other pages, unfortunately does not actually work.

I suspect https://github.com/mdn/browser-compat-data#readme would do nicely, but lack the means to do a global search/replace on MDN (and anyway, it's safer to get bulk edits reviewed before they are done).

[Elchi3]

Grr. My mistake! Thanks for filing this. I will take a look.

[Elchi3]

Fixed.