[DOCS] Retitle Elasticsearch Ruby Client doc book

jrodewig · picandocodigo · commit 1a204c70ac48 · 2021-10-13T09:10:44.000+01:00
diff --git a/docs/index.asciidoc b/docs/index.asciidoc
@@ -1,4 +1,4 @@
-= Ruby and Rails Integrations
+= Elasticsearch Ruby Client
 
 :doctype:           book
 
