fix: webhooks microservice not starting in staging or production

[euanmillar]

QA_ENV: default doesnt exist and as it is undefined in staging or production docker compose, the webhooks container doesnt start.

[github-actions]

Oops! Looks like you forgot to update the changelog. When updating CHANGELOG.md, please consider the following:

• Changelog is read by country implementors who might not always be familiar with all technical details of OpenCRVS. Keep language high-level, user friendly and avoid technical references to internals.
• Answer "What's new?", "Why was the change made?" and "Why should I care?" for each change.
• If it's a breaking change, include a migration guide answering "What do I need to do to upgrade?".

[naftis]

LGTM, the same configuration is applied in user-mgnt.

[github-actions]

This PR has been marked with label stale Since it has been inactive for 20 days. It will automatically be closed in 10 days if no further activity occurs.