fix: icon extension index should be higher than data-bar extension

[lumixraku]

close #483
https://github.com/dream-num/univer-pro/issues/483

Pull Request Checklist

• Related tickets or issues have been linked in the PR description (or missing issue).
• Naming convention is followed (do please check it especially when you created new plugins, commands and resources).
• Unit tests have been added for the changes (if applicable).
• Breaking changes have been documented (or no breaking changes introduced in this PR).

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 27.09%. Comparing base (c2b0019) to head (24d0760).

Files	Patch %	Lines
...nditional-formatting/src/render/data-bar.render.ts	0.00%	1 Missing ⚠️
...s-conditional-formatting/src/render/icon.render.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #2421   +/-   ##
=======================================
  Coverage   27.09%   27.09%           
=======================================
  Files        1646     1646           
  Lines       83110    83110           
  Branches    17221    17221           
=======================================
  Hits        22520    22520           
  Misses      60590    60590           

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