Fix path for ZIP

[helen]

Description of the Change

Because of the Docker mapping the path $GITHUB_WORKSPACE in Bash is not the same as the path of github.workspace in the webhook payload. So, let's use the latter instead of trying to be smart with the path. If we want to avoid being so direct with the reference, I think we would need to upload and download the ZIP as an artifact which seems like a lot of unnecessary work to me. cc @shivapoudel

Alternate Designs

See above.

Benefits

Actually make #42 and #37 work.

Possible Drawbacks

More config to potentially break in individual workflow files themselves, I guess?

Verification Process

Ran a stripped down version of this in a test repo.

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests passed.

Applicable Issues

#4

Changelog Entry

[helen]

@shivapoudel Works now :)

[shivapoudel]

@helen Thanks! That works great!

Additionally do remove this bit of code

action-wordpress-plugin-deploy/action.yml

Lines 8 to 10 in 8624d15

	outputs:
	zip_path:
	description: 'Zip file path'