pipeline: inputs: windows-exporter-metrics: Add threading info

Signed-off-by: Alexa Kreizinger <alexakreizinger@gmail.com>

Author: alexakreizinger

pipeline/inputs/windows-exporter-metrics.md

@@ -63,6 +63,10 @@ The following table describes the available collectors as part of this plugin. A
 | paging\_file   | Exposes paging\_file statistics.                                                                | Windows | v2.1.9  |
 | process       | Exposes process statistics.                                                                      | Windows | v2.1.9  |
 
+## Threading
+
+This input always runs in its own [thread](../../administration/multithreading.md#inputs).
+
 ## Getting Started
 
 ### Simple Configuration File