Update docker

Changes:

- https://github.com/docker-library/docker/commit/811d896: Merge pull request https://github.com/docker-library/docker/pull/280 from infosiftr/ip6tables
- https://github.com/docker-library/docker/commit/094faa8: Add ip6tables in 20.10+

library/docker

@@ -11,7 +11,7 @@ Directory: 20.10
 
 Tags: 20.10.0-dind, 20.10-dind, 20-dind, dind
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 387e351394bfad74bceebf8303c6c8e39c3d4ed4
+GitCommit: 094faa88f437cafef7aeb0cc36e75b59046cc4b9
 Directory: 20.10/dind
 
 Tags: 20.10.0-dind-rootless, 20.10-dind-rootless, 20-dind-rootless, dind-rootless