[doc] Use correct OMP_PROC_BIND arguments in the tutorial examples

[green-br]

The example to use Stream seems to use OMP_PROC_BIND but sets possible values as close, cores, spread. This confused me and therefore suggest the following unless I am missing something.

cores does seem to be a valid option for OMP_PROC_BIND and only for OMP_PLACES.

true is a valid option and doesnt enforce a method for affinity. Could also be false to allow threads to migrate.

For example see: https://www.openmp.org/spec-html/5.0/openmpse52.html#x291-20580006.4

Is there another reason why it's set to cores as part of the learning experience? I couldn't see any reference to why it would be.

[vkarak]

Good catch. I think the original intent was to set the OMP_PLACES instead and use the "threads", "cores" and "sockets" values to parameterize.

[victorusu]

lgtm

[vkarak]

After a chat with @victorusu, it's fine to accept it as is. Thanks!