update docs with 413 response

docs/tutorial/SearchService.md

@@ -27,6 +27,7 @@
 - [Query With Cursor](#query-with-cursor)
 - [Get indexing status](#get-indexing-status)
 - [Version info endpoint](#version-info-endpoint)
+- [Known limitations](#known-limitations)
 
 ## Introduction <a name="introduction"></a>
 
@@ -1001,4 +1002,8 @@ This endpoint takes information from files generated by `spring-boot-maven-plugi
 - `version.info.buildPropertiesPath`
 - `version.info.gitPropertiesPath`
 
+## Known limitations <a name="known-limitations"></a>
+
+- The maximum content length of the elasticsearch response is 100Mb. If the response length exceeds 100Mb, a 413 status code will be returned without any search results.
+
 [Back to table of contents](#TOC)