Update dependency docker to v2.8.1 (#193)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [docker](https://circleci.com/developer/orbs/orb/circleci/docker) |
orb | patch | `2.8.0` -> `2.8.1` |

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.circleci/config.yml

@@ -1,7 +1,7 @@
 version: 2.1
 orbs:
   python: circleci/[email protected]
-  docker: circleci/[email protected].0
+  docker: circleci/[email protected].1
   github-cli: circleci/[email protected]
   codecov: codecov/[email protected]
 executors: