Fixed Openshift Pentest section broken/missing links

[Tochirou]

Very small PR which adds small tweaks to fix broken link on the openshift - jenkins subsection and author links.

[carlospolop]

Thanks @Tochirou !

[Tochirou]

erf sorry i'm no expert with gitbook page indexing, seems like the link to openshift-jenkins-build-overrides.md in the jenkins subsection page is still broken :(

[carlospolop]

Fixed:) No worries @Tochirou, let me know if you find any other issue, and feel free to update this section whenever you guys find more interesting attacks

[Tochirou]

Thanks a lot! We won't hesitate :)