Update README.md to point to xdem instead of geoutils

[erikmannerfelt]

In the end of the README, it states to push a feature branch to geoutils:main which is obviously wrong.

[rhugonnet]

Strange test failure, I restarted all CI runs!

For the "Contributing" file + README summary, I shortened it earlier this year to avoid repetition with other files (License, Install, etc) and keep it simple. But I now find it a bit "formal" (not too inviting)... What do you think?

I was thinking we could take some ideas from pyproj, which has a very inviting page (a bit too long to read to my taste, maybe we could mostly work on our intro, then keep our "Short" summary for experienced developers and add a "Long" one for new developers?): https://github.com/pyproj4/pyproj/blob/main/CONTRIBUTING.md
I also really like the effort to recognize contributors on the front page: https://github.com/pyproj4/pyproj#contributors-

[erikmannerfelt]

Strange test failure, I restarted all CI runs!

For the "Contributing" file + README summary, I shortened it earlier this year to avoid repetition with other files (License, Install, etc) and keep it simple. But I now find it a bit "formal" (not too inviting)... What do you think?

I was thinking we could take some ideas from pyproj, which has a very inviting page (a bit too long to read to my taste, maybe we could mostly work on our intro, then keep our "Short" summary for experienced developers and add a "Long" one for new developers?): https://github.com/pyproj4/pyproj/blob/main/CONTRIBUTING.md I also really like the effort to recognize contributors on the front page: https://github.com/pyproj4/pyproj#contributors-

That's good to make it as inviting as we can!

I also like the sentiment of attributing the contributors more (especially not us haha). As long as it's autonomous or at least validated, I'm all for it! Without validation, I think we'd easily fall behind when new contributors appear.

Mind making these into one or two issues?