Update docker examples in releases.md
Follow-up from !2639 (comment 940966942)
Let's update our examples in releases.md to reference a version that will have the dockerfile naming changes present (e.g, 15.0).
Follow-up from !2639 (comment 940966942)
Let's update our examples in releases.md to reference a version that will have the dockerfile naming changes present (e.g, 15.0).