Description of problem:

Chapter 4. Upgrading

https://access.redhat.com/documentation/en/red-hat-enterprise-linux-openstack-platform/version-7/release-notes/#chap-Upgrading

Please correct links

    Updating Director Packages and Images
    Updating Overcloud Packages

They point to url that is not found.

As to my knowledge the links should be:

Updating Director Packages and Images
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux_OpenStack_Platform/7/html/Director_Installation_and_Usage/chap-Updating_the_Environment.html#sect-Updating_Director_Packages

* Need info on images, whether it is inside same part or somewhere else, may the Docs team will know exact location.

Updating Overcloud Packages 
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux_OpenStack_Platform/7/html/Director_Installation_and_Usage/sect-Updating_the_Overcloud.html#sect-Updating_the_Overcloud_Packages

Thank you,
Regards,
Robin Černín