ES|QL: Make kibana docs for Query settings more consistent (#134881)

Author: luigidellaquila

docs/reference/query-languages/esql/kibana/definition/settings/project_routing.json

@@ -1109,7 +1109,7 @@ void renderKibanaCommandDefinition() throws Exception {
                 builder.field("type", setting.type().typeName());
                 builder.field("serverlessOnly", setting.serverlessOnly());
                 builder.field("preview", setting.preview());
-                builder.field("snapshot_only", setting.snapshotOnly());
+                builder.field("snapshotOnly", setting.snapshotOnly());
                 builder.field("description", setting.description());
                 String rendered = Strings.toString(builder.endObject());
                 logger.info("Writing kibana setting definition for [{}]:\n{}", name, rendered);