Clarify the sentence meaning

Co-authored-by: Pat <[email protected]>
Signed-off-by: Hiroshi Hatake <[email protected]>

pipeline/inputs/process-exporter-metrics.md

@@ -13,7 +13,7 @@ The Process Exporter Metrics plugin implements collecting of the various metrics
 
 **Important note:** All metrics including those collected with this plugin flow through a separate pipeline from logs and current filters do not operate on top of metrics.
 
-This plugin is only supported on Linux based operating systems due to heavily relying on proc filesystem.
+This plugin is only supported on Linux based operating systems as it uses the `proc` filesystem to access the relevant metrics.
 
 macOS does not have procfs. Therefore, this plugin won't work for it.