Broken link to golang-middleware section of README.md

[codegold79]

Under the section at 2.0 golang-middleware, there is a command that results in an error.

The command is

faas template pull https://github.com/openfaas-incubator/golang-middleware-template

The output from running that command is

❯ faas template pull https://github.com/openfaas-incubator/golang-middleware-template
Fetch templates from repository: https://github.com/openfaas-incubator/golang-middleware-template at master
2020/03/06 09:17:36 Attempting to expand templates from https://github.com/openfaas-incubator/golang-middleware-template
Cloning into '/var/folders/zj/vc4ln5h14djg9svz7x_t1d0r0000gq/T/openFaasTemplates019767266'...
remote: Repository not found.
fatal: repository 'https://github.com/openfaas-incubator/golang-middleware-template/' not found
Error while fetching templates: exit status 128

[alexellis]

Do you want to send a PR to fix?