Improve Contributors section of README template

[wooster0]

What if for example your name is username and your GitHub username is username too? Then this is what you would get from generating a template: (when you also replace the your-github-user accordingly)

• username username - creator, maintainer

This looks strange and quite confusing in my opinion.

But now with this PR, for the link name, the name is used which the user gave himself here in the settings:

When the user explicty entered his nickname or real name there, he likely wants this name to show up. Instead of both the GitHub username and the name. It's shorter and simple.

And for the link itself, the GitHub username is of course still used.

And for the "creator, maintainer" I don't see a reason to not make it 3 characters longer and use "and". Sounds better IMO.

So now the Contributors section would simply look like this:

---

Contributors

• username - creator and maintainer

[sdogruyol]

Thank you @r00ster91 👍