fix web formats

[skzhang1]

Why are these changes needed?

fix web format problem

Related issue number

Closes: #1674

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9708058) 39.46% compared to head (9c099cf) 50.97%.
Report is 5 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1728       +/-   ##
===========================================
+ Coverage   39.46%   50.97%   +11.50%     
===========================================
  Files          57       57               
  Lines        6020     6082       +62     
  Branches     1346     1482      +136     
===========================================
+ Hits         2376     3100      +724     
+ Misses       3449     2732      -717     
- Partials      195      250       +55     

Flag	Coverage Δ
unittests	50.88% <ø> (+11.41%)	⬆️

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[olaoluwasalami]

LGTM