[Docs] Adding community clojure client built on java low level rest client (#36484)

Author: mpenet

docs/community-clients/index.asciidoc

@@ -43,6 +43,9 @@ a number of clients that have been contributed by the community for various lang
 [[clojure]]
 == Clojure
 
+* https://github.com/mpenet/spandex[Spandex]: 
+  Clojure client, based on the new official low level rest-client.
+  
 * http://github.com/clojurewerkz/elastisch[Elastisch]:
   Clojure client.