chore(env): update ARTIFACT_BACKEND_VERSION

[droplet-bot]

Because

• The version of the artifact-backend service is not updated in the instill-core repository.

This commit

• updates the ARTIFACT_BACKEND_VERSION in the .env file to dcfb45e.
• updates the artifactBackend.image.tag in the helm chart values.yaml file to dcfb45e.

Changes in artifact-backend

• Initial version update

---

Note

Aligns artifact-backend image version across environments.

• Updates ARTIFACT_BACKEND_VERSION in .env to dcfb45e
• Updates artifactBackend.image.tag in charts/core/values.yaml to dcfb45e

^{Written by Cursor Bugbot for commit bd27f62. This will update automatically on new commits. Configure here.}