feat(github.release-please): add the upload_url and html_url outputs

[posquit0]

👋 Background

Callers that publish artifacts after a release need to upload assets to the created release or link to it, for example in a notification. github.release-please does not forward the release URLs yet.

What changed

• github.release-please: forward the upload_url and html_url outputs of the root component from googleapis/release-please-action@v5, in the order of its README.

Notes

• release-please takes both values from the response of the GitHub "Create a release" API (upload_url and html_url in src/github-api.ts), so upload_url is a URI template that ends with {?name,label}.
• Like the other release outputs, they are set only when a root release is created and are empty otherwise.
• Checked locally: yamllint and check-jsonschema --builtin-schema vendor.github-actions pass.

[github-actions]

👋 Welcome! Looks like this is your first pull request.

Hey, thanks for your contribution! Please give us a bit of time to review it. 😄

Please check out our contributing guidelines.

[github-actions]

GitHub Actions Integration

Repository	jactionlint	check-jsonschema (workflows)	check-jsonschema (actions)
tedilabs/github-actions	✅	✅	✅

✅ All 1 passed.