ci: run linters on dev/release changes

Created by: jhchabran

As mentioned by @leonore in https://github.com/sourcegraph/sourcegraph/pull/40019, making changes on the releases script is broken in CI because the diff detection sees no changes in the pr build type.

Test plan

sg ci preview with on 8845f1b215b7ebd18b6e35e8e50c0f4367d077f4