ci: bump DEPS_LOCK_ID to 9 for phase4 sweep image rebuild

Triggers Forgejo image workflow to publish main-<sha> replacing the
hand-imported main-phase4-sweep tag on railiance01.

.forgejo/workflows/image.yaml

@@ -65,7 +65,7 @@ jobs:
           export PATH="${HOME}/bin:${PATH}"
           echo "${REGISTRY_TOKEN}" | docker login "${REGISTRY}" -u "${REGISTRY_USER}" --password-stdin
           IMAGE="${REGISTRY}/${IMAGE_NAME}"
-          docker build --build-arg DEPS_LOCK_ID=5 -f buildctx/Dockerfile.ci \
+          docker build --build-arg DEPS_LOCK_ID=9 -f buildctx/Dockerfile.ci \
             -t "${IMAGE}:latest" -t "${IMAGE}:main-${SHORT}" buildctx
           docker push "${IMAGE}:latest"
           docker push "${IMAGE}:main-${SHORT}"