GitHub Build will not promote to Repo
```
Adding git commit
+ git add .
+ git status
+ grep -q 'Changes to be committed'
+ git commit --message 'New Homebridge Image Release 1.3.1'
[source 0d2cf77] New Homebridge Image Release 1.3.1
 1 file changed, 12 insertions(+), 12 deletions(-)
+ echo 'Pushing git commit'
+ git push -u origin HEAD:source
Pushing git commit
remote: error: GH006: Protected branch update failed for refs/heads/source.        
remote: 
remote: - Changes must be made through a pull request.        
To https://github.com/homebridge/homebridge.io.git
 ! [remote rejected] HEAD -> source (protected branch hook declined)
error: failed to push some refs to 'https://github.com/homebridge/homebridge.io.git'
```