Update cisco-n2k-c2248tp-1ge - Add image (netbox-community#2172)

Added front image and comment to the data sheet on Cisco's Website

Author: netravnen

device-types/Cisco/N2K-C2248TP-1GE.yaml

@@ -5,6 +5,10 @@ slug: cisco-n2k-c2248tp-1ge
 part_number: N2K-C2248TP-1GE
 u_height: 1
 is_full_depth: true
+front_image: true
+rear_image: false
+is_powered: true
+comments: '[Cisco Nexus 2000 Series Fabric Extenders Data Sheet](https://www.cisco.com/c/en/us/products/collateral/switches/nexus-2000-series-fabric-extenders/data_sheet_c78-507093.htmlhtml)'
 interfaces:
   - name: Ethernet1/1/1
     type: 1000base-t