Updating configuring-security.md

[ArooshLele]

Describe your pull request here:
As discussed with @DivergentEuropeans Lenny, a Note related to Security permissions is added into this file.

List the file(s) included in this PR:
configuring-security.md

After creating the PR, follow the instructions in the comments.
CC: @ArooshLele @DivergentEuropeans @1000TurquoisePogs @gauravs-20

[github-actions]

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[github-actions]

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[1000TurquoisePogs]

This is a good topic to improve, but I don't think it will be seen or understood in the place you put your info.

1. you have only made a v3.0.0 doc, but if you're trying to update documentation people will see, you need to do a v3 latest doc, and then to get the widest audience, update all the versioned_docs (like this, but all the others too)

2. The page you've edited is in the context of action items for admins to do to set up the zowe server security setup. You've added a section talking about zowe user security setup. I just don't think this is in the right section.
   I'm not sure there is a good place to put this currently, you may need to create a new page to better represent this, and reorg the more visible pages to point ot it.
   Check out

https://github.com/zowe/docs-site/blob/master/docs/user-guide/address-security-requirements.md

it (and the page you edited) reference

https://github.com/zowe/docs-site/blob/master/docs/user-guide/assign-security-permissions-to-users.md

At the bottom of that, there's a section about users.

As it is, that page saying 'users' at the top is misleading, because most of the page is about permissions of the STC account, not users. The bottom of the page is however about users.

I suggest

1. renaming https://github.com/zowe/docs-site/blob/master/docs/user-guide/assign-security-permissions-to-users.md to 'assign security permissions to STC accounts'
2. make a page that's actually about users, and populate it with content like you wrote, among other things.

[anaxceron]

Sean's comments seem very pertinent.

I also left some comment re: minor edits.

[anaxceron]

I'd suggest moving the parenthetical into a sub-bullet (and removing the parentheses)

[anaxceron]

Should the asterisks be in backticks? Like: "... have an ** OMVS segment defined ... "

[anaxceron]

Data set should be two words.