Update docker

Changes:

- https://github.com/docker-library/docker/commit/cff5be4: Merge pull request https://github.com/docker-library/docker/pull/361 from infosiftr/plugins
- https://github.com/docker-library/docker/commit/9aaa758: Add "buildx" and "compose" CLI plugins (for supported architectures of each)

library/docker

@@ -6,7 +6,7 @@ GitRepo: https://github.com/docker-library/docker.git
 
 Tags: 20.10.15, 20.10, 20, latest, 20.10.15-alpine3.15
 Architectures: amd64, arm64v8
-GitCommit: 51f3e36ac5300d2e8734d2995d600ca4681d5c38
+GitCommit: 9aaa75893c70431f1302b0608af47ee26d67edf2
 Directory: 20.10
 
 Tags: 20.10.15-dind, 20.10-dind, 20-dind, dind, 20.10.15-dind-alpine3.15