Added json_body example.

[klemens-morgenstern]

[cppalliance-bot]

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An automated preview of the documentation is available at https://2511.beastdocs.prtest.cppalliance.org/libs/beast/doc/html/index.html

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[codecov[bot]]

Codecov Report

Merging #2511 (3405906) into develop (76043de) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #2511   +/-   ##
========================================
  Coverage    94.72%   94.72%           
========================================
  Files          152      152           
  Lines        11868    11868           
========================================
  Hits         11242    11242           
  Misses         626      626           

Impacted Files	Coverage Δ
include/boost/beast/core/impl/multi_buffer.hpp	97.59% <0.00%> (ø)

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[klemens-morgenstern]

@vinniefalco waiting for your approval.

[vinniefalco]

Commit messages should not describe a past event but should instead a sentence using a form of the verb to-be. For example: "streaming JSON body is an example"

[vinniefalco]

Seems ok