NAS-135175 / 25.10 / Allow limited html in app description

[undsoft]

Testing:

Check description on an app page.

[bugclerk]

Jira URL: https://ixsystems.atlassian.net/browse/NAS-135175

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 83.73%. Comparing base (8ae8de1) to head (8b7cb9c). Report is 7 commits behind head on master.

:white_check_mark: All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #11848   +/-   ##
=======================================
  Coverage   83.73%   83.73%           
=======================================
  Files        1672     1672           
  Lines       59627    59629    +2     
  Branches     6558     6558           
=======================================
+ Hits        49926    49928    +2     
  Misses       9701     9701           

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[bugclerk]

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