Hi fibo2358,
The best way is to report them here on the forum and I will file an internal bug report for the Documentation team. I used to write all the PM documentation, but now another person is in charge of it, so I mostly make suggestions about what needs to be changed.
You can file a bug report on the public bug tracker at
http://bugs.processmaker.com, but the developers who read the bugs aren't on the documentation team, so they are less likely to make sure that your changes are included in the wiki.