Mention that you can run the github actions locally

[SuperSandro2000]

I think we should recommend https://github.com/nektos/act in the contributions guide.

If you are heavily testing stuff it is faster to run the tests locally instead of pushing all the time. This also allows you to debug them in a broader way and test your changes while developing with all supported distros.

[rhansen]

A quick "how-to" would be nice too.

[SuperSandro2000]

Most important command: sudo act -j test-centos6.