fixed docu

Author: Mark

docs/api_overview.md

@@ -1,9 +1,9 @@
-* [Driver Setup](docs/api_overview.md#driver-setup)
-* [Basic database operations](docs/api_overview.md#basic-database-operations)
-* [Multi document operations](docs/api_overview.md#multi-document-operations)
-* [AQL](docs/api_overview.md#aql)
-* [Graphs](docs/api_overview.md#graphs)
-* [Foxx](docs/api_overview.md#foxx)
+* [Driver Setup](#driver-setup)
+* [Basic database operations](#basic-database-operations)
+* [Multi document operations](#multi-document-operations)
+* [AQL](#aql)
+* [Graphs](#graphs)
+* [Foxx](#foxx)
 
 
 # Driver Setup