chore(deps): update alpine:3.20 docker digest to 31687a2

This MR contains the following updates:

Package	Type	Update	Change
alpine	final	digest	780405d -> 31687a2

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This MR has been generated by Renovate Bot.

restored source branch renovate/alpine-3.20

enabled an automatic merge when all merge checks for e18716e6 pass

mentioned in issue #1

mentioned in commit 8b230af9

merged