Update index.adoc

Part of apache#4545 issue
Metadata types page updated with valid title

docs/hop-user-manual/modules/ROOT/pages/metadata-types/index.adoc

@@ -18,7 +18,7 @@ under the License.
 :page-pagination-no-back:
 :description: Metadata is one of the cornerstones in Hop and can be defined as workflows, pipelines and any other type of metadata objects. Hop Gui has a Metadata Perspective to manage all types of metadata: run configurations, database (relational and NoSQL) connections, logging, and pipeline probes just to name a few.
 
-== Metadata Types
+= Metadata Types
 
 Metadata is one of the cornerstones in Hop and can be defined as workflows, pipelines and any other type of metadata objects.
 
@@ -52,4 +52,4 @@ By default, Hop contains the following metadata types:
 * xref:metadata-types/splunk-connection.adoc[Splunk Connection]: Describes a Splunk connection
 * xref:hop-server/web-service.adoc[Web Service]: Allows to run a pipeline to generate output for a servlet on Hop Server
 * xref:metadata-types/workflow-log.adoc[Workflow Log]: Allows to log the activity of a workflow with a pipeline
-* xref:metadata-types/workflow-run-config.adoc[Workflow Run Configuration]: Describes how to run a workflow
+* xref:metadata-types/workflow-run-config.adoc[Workflow Run Configuration]: Describes how to run a workflow