Impl: Add channel_id as output

[kozr]

Description

I just added a channel id output with key channel_id

Closes: #35

kozr#7
https://github.com/kozr/action-hosting-deploy/runs/1653935215?check_suite_focus=true

Feedbacks are always welcome.

Type of change

• 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 not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Worked on my forked repo with a new Firebase project

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules