Added a link to the SocketCAN device plugin

Author: jpc

content/en/docs/concepts/extend-kubernetes/compute-storage-net/device-plugins.md

@@ -350,6 +350,7 @@ Here are some examples of device plugin implementations:
     * Requires [nvidia-docker](https://github.com/NVIDIA/nvidia-docker) 2.0, which allows you to run GPU-enabled Docker containers.
 * The [NVIDIA GPU device plugin for Container-Optimized OS](https://github.com/GoogleCloudPlatform/container-engine-accelerators/tree/master/cmd/nvidia_gpu)
 * The [RDMA device plugin](https://github.com/hustcat/k8s-rdma-device-plugin)
+* The [SocketCAN device plugin](https://github.com/collabora/k8s-socketcan)
 * The [Solarflare device plugin](https://github.com/vikaschoudhary16/sfc-device-plugin)
 * The [SR-IOV Network device plugin](https://github.com/intel/sriov-network-device-plugin)
 * The [Xilinx FPGA device plugins](https://github.com/Xilinx/FPGA_as_a_Service/tree/master/k8s-fpga-device-plugin) for Xilinx FPGA devices