Update ops.html

[jaapterwoerds]

No description provided.

[rbowen]

This patch replaces:

primary->secondary.enable

with

primary->secondary.enabled

in several places in ops.html.

LTGM.

[divijvaidya]

Hey @jaapterwoerds
Thank you for the contributions and welcome to the Kafka community (I noticed that this is your first contribution!).

As you might already be aware, this bug has already been fixed in all versions released since late 2021, as part of apache/kafka#10433. The change you are submitting here is for documentation of version 2.8.
As part of our end of life policy, that is an unsupported version and we usually don't backport changes (documentation or otherwise) to the unsupported versions.

Having said that, since this is your first commit to our community, I will request the reviewers to merge this change in.

(As an aside, it helps the reviewers if you add a motivation and the description of the change in the summary section)

[showuon]

Thanks @jaapterwoerds and @divijvaidya