[DOCS] Low Level REST Client should emphasize ContentType #22940
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This adds a callout to note that the Low Level REST Client example sets the
ContentType
explicitly and that users should do the same (ContentType
is required by all of theHttpEntity
's that I am aware of, but it's not required to be set properly).I will drop the
Future releases of Elasticsearch will require this to be set properly.
sentence from the master branch in a follow-up commit.Relates to #19388