Update doc about cos bucket naming restriction #8
Description
The following doc says:
It is also not possible to create a bucket with a name beginning with cosv1- or account- as these prefixes are reserved by the system.
This information should be added to here too -> https://cloud.ibm.com/docs/devsecops?topic=devsecops-cd-devsecops-cos-bucket-evidence#cd-devsecops-cos-bucket-name