fixed indentation issue

[florianeichin]

wrong indentation made the note to include the own certificate section as well

[mattermod]

Thanks @florianeichin for the pull request!

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[amyblais]

Hi @florianeichin!

Would you like to sign the CLA ^ and then we can help review and merge the PR?

Thank you for contributing to Mattermost!

[amyblais]

Thank you!