[DOCS] fixed count docs, it now requires a top-level query object, same as other apis
[DOCS] fixed count docs, it now requires a top-level query object, same as other apis

Relates to #4074

fubuki/elasticsearch,fubuki/elasticsearch,aparo/elasticsearch,aparo/elasticsearch,aparo/elasticsearch,fubuki/elasticsearch,aparo/elasticsearch,fubuki/elasticsearch,aparo/elasticsearch,fubuki/elasticsearch,fubuki/elasticsearch,vorce/es-metrics,vorce/es-metrics,vorce/es-metrics,aparo/elasticsearch,vorce/es-metrics,vorce/es-metrics