Scaling up performance documentation error

The commands provided in scaling up performance is not correct.
Following needs to be fixed

• oc env command is deprecated in OCP 3.11. This should be changed to oc set env. Might also need to specify different commands for OCP 3.10 and 3.11.*
• Following command has to be updated for APICAST_WORKERS.

oc env dc/apicast --overwrite APICAST_WORKERS=<number_of_processes>

oc set env dc/apicast-{production/staging} --overwrite APICAST_WORKERS=<number_of_processes>

• Also the following command needs to be changed for PUMA_WORKERS

oc env dc/backend --overwrite PUMA_WORKERS=<number_of_processes>

oc set env dc/backend-listener --overwrite PUMA_WORKERS=<number_of_processes>