Bump golang from a5588b9 to 6e069c2 in /clone/cmd/sumdbclone (#994)

Bumps golang from `a5588b9` to `6e069c2`.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

clone/cmd/sumdbclone/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.21.3-alpine3.17@sha256:a5588b9dd0b185020a9acf8471c536304d78af57f3a5c1b474bdb0bc90734a4a AS builder
+FROM golang:1.21.3-alpine3.17@sha256:6e069c2467a974f2b77ebee687d820d864e9632d2c606bd7e8478b2be437678e AS builder
 
 ARG GOFLAGS=""
 ENV GOFLAGS=$GOFLAGS