[DOCS] Fix EQL heading levels (#70255)
[DOCS] Fix EQL heading levels (#70255)

Co-authored-by: Elastic Machine <aba0ff71c61dffd83d6f2c8185bc4b064b23c44a@users.noreply.github.com>
robin13/elasticsearch,robin13/elasticsearch,GlenRSmith/elasticsearch,robin13/elasticsearch,GlenRSmith/elasticsearch,GlenRSmith/elasticsearch,robin13/elasticsearch,robin13/elasticsearch,GlenRSmith/elasticsearch,GlenRSmith/elasticsearch