After the migration of the technical documentation from VMware's domain to Broadcom's the certificate rotation procedure links at the Tanzu Operations Manager UI certificates page lead to a 404 page not found error.
Tanzu Operations Manager 3.x
At the moment there is no resolution.
As workaround, edit the URL modifying the version from "3.0" to "3-0".
For example:
https://techdocs.broadcom.com/us/en/vmware-tanzu/platform/tanzu-operations-manager/3.0/tanzu-ops-manager/security-pcf-infrastructure-rotate-cas-and-leaf-certs.html#add-new-ca
--> This link will lead to a 404: Page not found
After editing the version:
https://techdocs.broadcom.com/us/en/vmware-tanzu/platform/tanzu-operations-manager/3-0/tanzu-ops-manager/security-pcf-infrastructure-rotate-cas-and-leaf-certs.html#add-new-ca
--> This link will get to the technical documentation.