(promote) release: build v6.12.0#1338

DaedalusG wants to merge 1 commit intointernal/release-v6.12.0sourcegraph/deploy-sourcegraph-docker:internal/release-v6.12.0from

promote/release-v6.12.0sourcegraph/deploy-sourcegraph-docker:promote/release-v6.12.0Copy head branch name to clipboard