Update golang:1.17-alpine Docker digest to 99ddec1 - autoclosed

Created by: renovate[bot]

This PR contains the following updates:

Package	Type	Update	New value	Sourcegraph
golang	stage	digest	1.17-alpine

Test plan: CI should pass with updated dependencies. No review required: this is an automated dependency update PR.

Configuration

Schedule: Branch creation - "on the 1st through 7th day of the month" in timezone America/Los_Angeles, Automerge - At any time (no schedule defined).

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

Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

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

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