Updates footer issue link

[AndrewBreyen]

The footer issue link was incorrect. Updated to https://github.com/tonesto7/homebridge-smartthings/issues

Checklist:

• [x ] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.

Types of changes

• [x ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Description of Changes

Update to correct issues URL

Reason for Change

Points users to correct issues URL

How Has This Been Tested?

just a simple URL change

Screenshots (if appropriate):