Adding newline

docs/configuration/configuration.md

@@ -6,7 +6,7 @@ This page is under construction.
 Sometimes you don't need all metrics in your prometheus endpoint which this plugin provides. 
 You can disable certain metrics. These metrics are not being collected by the plugin and therefore not added in the 
 prometheus endpoint.
-
+A
 ![img.png](img/disabled_metrics.png)
 
 ### Regex Entry
@@ -15,4 +15,4 @@ default_jenkins_disk.*
 
 ### Fully qualified Name Entry
 If you want to disable certain individual entries you can do it with this entry. The value should be the same
-as you can see it in the prometheus endpoint. It's case-insensitive. 
+as you can see it in the prometheus endpoint. It's case-insensitive.