docs: correct wrong variable name in the doc for reindexProductsChunkSize

docs/content/typescript-api/core-plugins/elasticsearch-plugin/elasticsearch-options.md

@@ -170,7 +170,7 @@ indexMappingProperties: {
 
 {{< /member-description >}}
 
-### reindexProductChunkSize
+### reindexProductsChunkSize
 
 {{< member-info kind="property" type="number" default="500"  >}}