fix(formula): get rich text data stream as content

[Dushusir]

• I am sure that the code is update-to-date with the dev branch.

close #1114

[github-actions]

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Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (dev@309eda2). Click here to learn what that means.
Report is 2 commits behind head on dev.

Files	Patch %	Lines
packages/engine-formula/src/engine/utils/cell.ts	83.33%	2 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##             dev    #1305   +/-   ##
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  Coverage       ?   29.63%           
======================================
  Files          ?      844           
  Lines          ?    47802           
  Branches       ?     9797           
======================================
  Hits           ?    14168           
  Misses         ?    33634           
  Partials       ?        0           

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