chore(deps): update debian:12.12 docker digest to 6337ad8 (#2681)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

ci/images/debian/Dockerfile.swift6

@@ -1,5 +1,5 @@
 # Base-image
-FROM debian:12.12@sha256:26f2a7cab45014541c65f9d140ccfa6aaefbb49686c6759bea9c6f7f5bb3d72f AS base
+FROM debian:12.12@sha256:6337ad82d5c764a8b6a16cde86b157fdce353e36d8ca06fc1b16d4f34d29960e AS base
 
 ARG DEBIAN_REPO
 ARG GITHUB_RAW_URL=https://raw.githubusercontent.com