Update docker

Changes:

- https://github.com/docker-library/docker/commit/d4b2a80: Update 20.10-rc to 20.10.0-rc1

library/docker

@@ -4,22 +4,22 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/docker.git
 
-Tags: 20.10.0-beta1, 20.10-rc, rc
+Tags: 20.10.0-rc1, 20.10-rc, rc
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: b6597f7fc1294f4ee3345576f06889d2ff773a8d
+GitCommit: d4b2a80dc1f742ffcb6b94187069cca731652967
 Directory: 20.10-rc
 
-Tags: 20.10.0-beta1-dind, 20.10-rc-dind, rc-dind
+Tags: 20.10.0-rc1-dind, 20.10-rc-dind, rc-dind
 Architectures: amd64, arm32v6, arm32v7, arm64v8
 GitCommit: b1d2628005e12e79079c025c3653cba248d6f264
 Directory: 20.10-rc/dind
 
-Tags: 20.10.0-beta1-dind-rootless, 20.10-rc-dind-rootless, rc-dind-rootless
+Tags: 20.10.0-rc1-dind-rootless, 20.10-rc-dind-rootless, rc-dind-rootless
 Architectures: amd64
-GitCommit: eaae683d362a40f118cde7f7be936b27289d0817
+GitCommit: d4b2a80dc1f742ffcb6b94187069cca731652967
 Directory: 20.10-rc/dind-rootless
 
-Tags: 20.10.0-beta1-git, 20.10-rc-git, rc-git
+Tags: 20.10.0-rc1-git, 20.10-rc-git, rc-git
 Architectures: amd64, arm32v6, arm32v7, arm64v8
 GitCommit: b6597f7fc1294f4ee3345576f06889d2ff773a8d
 Directory: 20.10-rc/git