This commit updates the documentation build and publish workflows to
use a specific runner image version, ubuntu-20.04, instead of the
latest version in order to prevent any potential breakages due to the
'latest' version change by GitHub.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
This commit updates the CI documentation build workflow to upload the
HTML pull request documentation builds to the S3 builds.zephyrproject.io
bucket so that they are directly accessible from the web.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>