Elastic Search template missing new ES builds

The ES template is missing the newer ES builds. Should we direct customers to use the one from the marketplace instead?
The marketplace offers:
"esVersion": {
"type": "string",
"defaultValue": "5.1.2",
"allowedValues": [
"2.0.2",
"2.1.2",
"2.2.0",
"2.3.2",
"2.3.3",
"2.3.4",
"2.3.5",
"2.4.0",
"2.4.1",
"5.0.2",
"5.1.1",
"5.1.2"

The issue names no file or test; start by locating the Elasticsearch quickstart template and its ES version list. Compare the template with the marketplace allowedValues shown here, then confirm whether the expected outcome is adding newer builds or directing customers to the marketplace, with the chosen behavior reflected in the template or its documentation.

Written by the indexing model from the issue text.