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 f566610.
• updates the artifactBackend.image.tag in the helm chart values.yaml file to f566610.

Changes in artifact-backend

• perf(files): batch ListFiles enrichment queries (remove N+1 / OR-chain) (perf(files): batch ListFiles enrichment queries (remove N+1 / OR-chain) artifact-backend#362)
• fix(rag): account input characters for direct Gemini embedding usage (fix(rag): account input characters for direct Gemini embedding usage artifact-backend#361)
• fix: push down file list filters
• fix(repo): clear content hash on file delete
• feat(worker): relay RAG model usage metadata
• feat(artifact)!: R3 rename parent_project → parent_folder (CE side) (feat(artifact)!: R3 rename parent_project → parent_folder (CE side) artifact-backend#358)
• fix(handler): accept parent_project in UpdateFileAdmin field mask (fix(handler): accept parent_project in UpdateFileAdmin field mask artifact-backend#357)
• feat(handler): populate File.ParentProject from DB column in API responses (feat(handler): populate File.ParentProject from DB column in API responses artifact-backend#356)
• feat(worker): add file chunk integrity probe, fix reprocess idempotency race, and graceful Milvus degradation