Update Debian "How It's Made" from "build.sh" to "debian.sh"

Author: tianon

debian/content.md

@@ -30,7 +30,7 @@ ENV LANG en_US.utf8
 
 ## How It's Made
 
-The rootfs tarballs for this image are built using [the reproducible-Debian-rootfs tool, `debuerreotype`](https://github.com/debuerreotype/debuerreotype), with an explicit goal being that they are transparent and reproducible. Using the same toolchain, it should be possible to regenerate (clean-room!) the same tarballs used for building the official Debian images. [The `build.sh` script in that debuerreotype repository](https://github.com/debuerreotype/debuerreotype/blob/master/build.sh) (and the `build-all.sh` companion/wrapper) is the canonical entrypoint used for creating the artifacts published in this image.
+The rootfs tarballs for this image are built using [the reproducible-Debian-rootfs tool, `debuerreotype`](https://github.com/debuerreotype/debuerreotype), with an explicit goal being that they are transparent and reproducible. Using the same toolchain, it should be possible to regenerate (clean-room!) the same tarballs used for building the official Debian images. [The `examples/debian.sh` script in that debuerreotype repository](https://github.com/debuerreotype/debuerreotype/blob/master/examples/debian.sh) (and the `debian-all.sh` companion/wrapper) is the canonical entrypoint used for creating the artifacts published in this image (via a process similar to the `docker-run.sh` included in the root of that repository).
 
 Additionally, the scripts in [%%GITHUB-REPO%%](%%GITHUB-REPO%%) are used to create each tag's `Dockerfile` and collect architecture-specific tarballs into [`dist-ARCH` branches on the same repository](%%GITHUB-REPO%%/branches), which also contain extra metadata about the artifacts included in each build, such as explicit package versions included in the base image (`rootfs.manifest`), the exact snapshot.debian.org timestamp used for `debuerreotype` invocation (`rootfs.debuerreotype-epoch`), the `sources.list` found in the image (`rootfs.sources-list`) and the one used during image creation (`rootfs.sources-list-snapshot`), etc.