Update python:3.6 Docker digest to 218e677 (#1341)
Update python:3.6 Docker digest to 218e677 (#1341)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| python | digest | `3.6` -> `218e677` |

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### Renovate configuration

:date: **Schedule**: At any time (no schedule defined).

:vertical_traffic_light: **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

:recycle: **Rebasing**: Whenever PR becomes conflicted, or if you modify the PR title to begin with "`rebase!`".

:no_bell: **Ignore**: Close this PR and you won't be reminded about this update again.

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