Update organization GitHub pages URL

[bingenito]

Change opensource.morganstanley.com to morganstanley.github.io as the domain will be removed

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.87%. Comparing base (5a78800) to head (bd77e07).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #725   +/-   ##
=======================================
  Coverage   93.87%   93.87%           
=======================================
  Files          16       16           
  Lines        1486     1486           
  Branches      265      265           
=======================================
  Hits         1395     1395           
  Misses         90       90           
  Partials        1        1           

Flag	Coverage Δ
unittests	93.87% <ø> (ø)

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