Change config file indentation to 2 spaces

plugins/system/net.go

@@ -19,11 +19,11 @@ func (_ *NetIOStats) Description() string {
 }
 
 var netSampleConfig = `
-	# By default, telegraf gathers stats from any up interface (excluding loopback)
-	# Setting interfaces will tell it to gather these explicit interfaces,
-	# regardless of status.
-	#
-	# interfaces = ["eth0", ... ]
+  # By default, telegraf gathers stats from any up interface (excluding loopback)
+  # Setting interfaces will tell it to gather these explicit interfaces,
+  # regardless of status.
+  #
+  # interfaces = ["eth0", ... ]
 `
 
 func (_ *NetIOStats) SampleConfig() string {