Update SUPPORT.md

[JBurkinshaw]

SUPPORT.md has not been edited since this repository's creation.

Update the following in SUPPORT.md:

• Determine whether Customer Service & Support is required and update the file accordingly.
• Determine what is required in the following section and update accordingly:

  For help and questions about using this project, please REPO MAINTAINER: INSERT INSTRUCTIONS HERE FOR HOW TO ENGAGE REPO OWNERS OR COMMUNITY FOR HELP. COULD BE A STACK OVERFLOW TAG OR OTHER CHANNEL. WHERE WILL YOU HELP PEOPLE?.