Merge pull request prometheus#1729 from carlpett/update-windows-exporter-reference

Update windows_exporter reference

Author: SuperQ

README.md

@@ -9,7 +9,7 @@
 Prometheus exporter for hardware and OS metrics exposed by \*NIX kernels, written
 in Go with pluggable metric collectors.
 
-The [WMI exporter](https://github.com/martinlindhe/wmi_exporter) is recommended for Windows users.
+The [Windows exporter](https://github.com/prometheus-community/windows_exporter) is recommended for Windows users.
 To expose NVIDIA GPU metrics, [prometheus-dcgm
 ](https://github.com/NVIDIA/gpu-monitoring-tools/tree/master/exporters/prometheus-dcgm)
 can be used.