Change the get.sh owner value to openfaas

[LucasRoesler]

What

• update the OWNER value in the get.sh because the repo has cahgned
  from openfaas-incubator to openfaas

How Has This Been Tested?

Ran the script locally

➜  ofc-bootstrap git:(master) ✗ sudo bash get.sh 
x86_64
Downloading package https://github.com/openfaas/ofc-bootstrap/releases/download/0.9.5/ofc-bootstrap as /tmp/ofc-bootstrap
Download complete.
Running with sufficient permissions to attempt to move ofc-bootstrap to /usr/local/bin
New version of ofc-bootstrap installed to /usr/local/bin
  ___  _____ ____ 
 / _ \|  ___/ ___|
| | | | |_ | |    
| |_| |  _|| |___ 
 \___/|_|   \____|
ofc-bootstrap
Bootstrap your own OpenFaaS Cloud within 100 seconds
Commit: 88f790dd37ea37149c55a47c6b60ab56307e77c3
Version: 0.9.5

Checklist:

I have:

• checked my changes follow the style of the existing code / OpenFaaS repos
• updated the documentation and/or roadmap in README.md
• read the CONTRIBUTION guide
• signed-off my commits with git commit -s
• added unit tests

[alexellis]

Thank you 👍