minor doc fixes (#658)

Author: fashxp

doc/10_GraphQL/04_Query/11_Query_Samples/24_Sample_Fieldcollections.md

@@ -43,7 +43,7 @@ Deeplink: https://demo.pimcore.fun/admin/login/deeplink?object_767_object
 
 and make sure that the `/News` folder is readable.
 
-![Workspace](../../img/graphql/news_workspace.png)
+![Workspace](../../../img/graphql/news_workspace.png)
 
 ### Response
 

doc/10_GraphQL/README.md

@@ -1,3 +1,7 @@
+---
+title: GraphQL
+---
+
 # ![GraphQL Icon](../img/graphql/logo_small.png) GraphQL 
 
 With [GraphQL](https://graphql.org/) endpoints, Datahub allows integrating Pimcore to other systems