docs: updates security section

[nilekhc]

What type of PR is this?

/kind documentation

What this PR does / why we need it:
Updates security documentation.

Which issue(s) this PR fixes (optional, using fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when the PR gets merged):
Fixes #

Special notes for your reviewer:

TODOs:

• squashed commits
• includes documentation
• adds unit tests

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (841fb0d) 55.00% compared to head (7b79a29) 55.00%.
Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1378   +/-   ##
=======================================
  Coverage   55.00%   55.00%           
=======================================
  Files          22       22           
  Lines        2327     2327           
=======================================
  Hits         1280     1280           
  Misses        923      923           
  Partials      124      124           

☔ View full report in Codecov by Sentry.
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[nilekhc]

/test pull-secrets-store-csi-driver-e2e-windows

[aramase]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aramase, nilekhc

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[nilekhc]

/test pull-secrets-store-csi-driver-e2e-windows

[nilekhc]

/test pull-secrets-store-csi-driver-e2e-windows

[nilekhc]

/test pull-secrets-store-csi-driver-e2e-windows

[nilekhc]

/test pull-secrets-store-csi-driver-e2e-windows

[aramase]

/lgtm

[k8s-ci-robot]

@nilekhc: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-secrets-store-csi-driver-image-scan	c219f51	link	false	/test pull-secrets-store-csi-driver-image-scan

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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