content/markdown/project-roles.md links to private page

[elharo]

Bug description

https://svn.apache.org/repos/private/pmc/maven/project-conventions.txt is password protected. I'm not sure what the public equivalent is here.

Maven site URL where bug exists

https://maven.apache.org/project-roles.html

[hboutemy]

there is no equivalent: it's for easier reference by the PMC members who have access

IMHO, the best we can do is to explicitely mark something like "PMC members access only": I could not find a good phrasing, for this link from public side of operations to the private one