Add Minio (#1023)

Add Minio to list of software exposing Prometheus metrics
Signed-off-by: Nitish Tiwari <nitish@minio.io>

content/docs/instrumenting/exporters.md

@@ -185,6 +185,7 @@ separate exporters are needed:
    * [Kubernetes](https://github.com/kubernetes/kubernetes) (**direct**)
    * [Linkerd](https://github.com/BuoyantIO/linkerd)
    * [mgmt](https://github.com/purpleidea/mgmt/blob/master/docs/prometheus.md)
+   * [Minio](https://github.com/minio/minio)
    * [Netdata](https://github.com/firehol/netdata)
    * [Pretix](https://pretix.eu/)
    * [Quobyte](https://www.quobyte.com/) (**direct**)