Change the release process documentation to only use the overview of the
release notes for GitHub releases rather than the full file.
The current instructions of copying the full content are broken (the
file does not fit anyway and the formatting is incompatible) and result
in a cluttered page anyway (the UI is not really meant for long release
notes).
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
fa51b3db1c
