fix(ci): replace bitnami/minio with official minio/minio image

Bitnami pulled free Docker Hub images Aug 2025; the integration job
failed at docker pull. Uses the same pinned release as docker-compose.yaml.

Author: Bhaskar-Kurasala

.github/workflows/ci.yml

@@ -59,7 +59,7 @@ jobs:
           --health-cmd "redis-cli ping"
           --health-interval 5s --health-timeout 5s --health-retries 12
       minio:
-        image: bitnami/minio:latest
+        image: minio/minio:RELEASE.2024-11-07T00-52-20Z
         env:
           MINIO_ROOT_USER: minioadmin
           MINIO_ROOT_PASSWORD: minioadmin