How to LGTM this PR (I'll work on a proper doc for this in
https://github.com/slsa-framework/slsa-github-generator/issues/112):
1. Clone repo
```
$ git clone git@github.com:slsa-framework/slsa-verifier.git
$ cd slsa-verifier
$ bash verify-release.sh v2.4.0 # NOTE: use the file in _this_ PR.
# Note down the path to the temporary dir use. The bash script will print its first line as "INFO: using dir: /tmp/tmp.VaYi6HfbmL"
```
2. Run command below and compare to SHA256SUM.md in this PR
```
$sha256sum /tmp/tmp.VaYi6HfbmL/*
```
The output hash should be the hash I'm updating to in this PR. If they
match, LGTM. If they don't, someone tampered with the released binary
and don't LGTM
---------
Signed-off-by: laurentsimon <laurentsimon@google.com>
