Updated Docker Hub link to point to gophish/gophish (#1732)
Updated Docker Hub link to point to gophish/gophish (#1732)

The Readme currently points to https://hub.docker.com/r/matteoggl/gophish/ which is a Docker image that hasn't been updated in over 2 years. This PR updates the Readme link to point to a more current Docker Image.
jordan-wright/gophish,jordan-wright/gophish,jordan-wright/gophish