Add doc for windows latency issue

[javerbukh]

Description

This pull request is to reference the ongoing work at #2263 to diagnose the Windows OS slowdown when using subsets in cubeviz.

Fixes #

Change log entry

• Is a change log needed? If yes, is it added to CHANGES.rst? If you want to avoid merge conflicts,
  list the proposed change log here for review and add to CHANGES.rst before merge. If no, maintainer
  should add a no-changelog-entry-needed label.

Checklist for package maintainer(s)

This checklist is meant to remind the package maintainer(s) who will review this pull request of some common things to look for. This list is not exhaustive.

• Are two approvals required? Branch protection rule does not check for the second approval. If a second approval is not necessary, please apply the trivial label.
• Do the proposed changes actually accomplish desired goals? Also manually run the affected example notebooks, if necessary.
• Do the proposed changes follow the STScI Style Guides?
• Are tests added/updated as required? If so, do they follow the STScI Style Guides?
• Are docs added/updated as required? If so, do they follow the STScI Style Guides?
• Did the CI pass? If not, are the failures related?
• Is a milestone set? Set this to bugfix milestone if this is a bug fix and needs to be released ASAP; otherwise, set this to the next major release milestone.
• After merge, any internal documentations need updating (e.g., JIRA, Innerspace)?

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (a9f13e9) 91.34% compared to head (4018883) 91.34%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2278   +/-   ##
=======================================
  Coverage   91.34%   91.34%           
=======================================
  Files         150      150           
  Lines       16848    16848           
=======================================
  Hits        15390    15390           
  Misses       1458     1458           

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[pllim]

LGTM and I don't think we need 2 approvals. Thanks!