Change to new shields badge

I posted an issue related to this on the main all-contributors repo, however it seems this is where the badge originates. Relevant Issues:

- all-contributors/all-contributors#361 - New Badge Style Preventing Inline Badge
- all-contributors/all-contributors#406 - Change to new badge

I have just had a PR deployed for a custom badge for all-contributors, which is now live meaning we can move away from the current method of manually updating them, or using the dynamic shield to have it automatic. Below is an example if the new badge, and the URL for it. As always it supports full customisation.


```
https://img.shields.io/github/all-contributors/*user*/*repo*/*branch*
```

Branch is optional, and will simply default to the master branch if it is not specified.