Add VOLTTRON Case Study to Resources page

Created by: jph152

Can we add the following to the case study section of https://iot.eclipse.org/community/resources/ ?

Landing page link: https://outreach.eclipse.foundation/volttron-iot-case-study?utm_campaign=VOLTTRON%20Case%20Study&utm_source=IoT%20resources Title: Eclipse VOLTTRON™ Proves Its Versatility and Value in Real-World IoT Deployments Description: Find out how this open source IoT platform is being used in applications ranging from automated fault detection and diagnostics to renewable energy. Image: