docs: fix examples for RequestBody

[xavierleune]

Hi,

this is my first try with this bundle and I got into an error that leads me to a discussion on github. Following the discussion here: #1990 (comment) I think that the documentation should be updated to match the "content" argument.
But maybe I've missed something else ?

Thanks !

What type of PR is this? (check all applicable)

• Bug Fix
• Feature
• Refactor
• Deprecation
• Breaking Change
• Documentation Update
• CI

Checklist

• I have made corresponding changes to the documentation (docs/)
• I have made corresponding changes to the changelog (CHANGELOG.md)

[DjordyKoert]

The documentation for annotations are correct

[DjordyKoert]

Thank you for the PR, seems like the documentation has always been incorrect here for attributes

[xavierleune]

@DjordyKoert thanks for your feedback, I should have been more careful about the annotations ^^

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.53%. Comparing base (ff91395) to head (9ea8657).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2415   +/-   ##
=======================================
  Coverage   89.53%   89.53%           
=======================================
  Files          78       78           
  Lines        2915     2915           
=======================================
  Hits         2610     2610           
  Misses        305      305           

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[DjordyKoert]

Thanks a lot :)