Update docker Docker tag to v20.10.12 (#18)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

.circleci/config.yml

@@ -23,7 +23,7 @@ jobs:
   build:
     working_directory: ~/project
     docker:
-      - image: docker:20.10.11-git
+      - image: docker:20.10.12-git
     steps:
       - checkout
       - setup_remote_docker: