Fix issue with regex check + missing outputs in v2.6.0

Thank you to @Dids for correcting several overlooked issues with the previous release!

Improve comments and add inputs and outputs

Improve comments on Pull Requests.

• Use Uffizzi's new predictable URL's before deployment starts.

Add reusable workflow inputs:

• URL path for post-deployment healthcheck
• Git reference, for use when called by workflow_run event

Add reusable workflow output:

• Uffizzi dashboard URL for containers just deployed

Remove deprecated set-output commands per GitHub https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

Documentation updates to README

Support `workflow_run` execution, external registries, and expiration

v2.5.0

Fix action at v2.4.0

New Feature: Deployment Metadata Labels

Use metadata labels instead of comments to track which deployments track with which Pull Requests. Comments are still posted and updated but are no longer used for decisions.

Description and example updates

Merge pull request #17 from UffizziCloud/output

Consolidate conditional step outputs.

Include GHCR credentials

v2.2.0

Specify GHA versions.

v2.1.0

• Include example reusable workflow.
• Add support for new Uffizzi feature: deployment access control

Clean-up description

v2.0.2

Update action.yaml

v2.0.1

First Marketplace Release

Now supports outputs

Supports outputs