Add note in userdoc regarding dracut and machine-id

[ssimpson89]

Description of the Pull Request (PR):

In Rocky Linux 8, running the provided dracut command does not create the initramfs in a place where Warewulf is expecting it and thus fails to pull the image during the two stage boot. The fix appears to be to remove machine-id from /etc. This documentation PR reflects that

Reviewer checklist

The reviewer checks the following items before merging the PR.

• The PR is based on the appropriate branch (typically main)
• All commits are "Signed off" (e.g., using git commit --signoff) in agreement to the DCO
• The CHANGELOG has been updated, if necessary, and under the correct release heading
• The userdocs have been updated, if necessary
• The submitter is listed in the contributors file
• The test suite has been updated, if necessary

[anderbubble]

@ssimpson89 thanks! Please...

• squash these commits together
• add yourself to the CONTRIBUTORS file
• update the CHANGELOG
• sign-off on the commit

Thanks again!

[anderbubble]

Also, @ssimpson89, in the future, I recommend always submitting PRs from a separate feature branch, not from your own main.

[anderbubble]

• squash these commits together
• add yourself to the CONTRIBUTORS file
• update the CHANGELOG
• sign-off on the commit

[ssimpson89]

I believe I have made all the requested changes

[anderbubble]

It looks like you missed the --signoff during commit; but I'll go ahead and merge for this PR; just keep that in mind for the future.

Thanks!