Fix a non-ASCII dash in the branch creation example, describe the master
updates needed after a release branch is created (mergify rules, supported
Kubernetes versions, upgrade guide), add the pending release notes reset to
the post-release steps, document the env variables gen_release_notes.sh
requires and the meaning of FROM_BRANCH and TO_TAG, remove the unused rc
tag example, update the example versions and example PRs to the v1.20
releases and link them, and list all of the artifacts a release build
publishes.
Signed-off-by: Joshua Hoblitt <josh@hoblitt.com>
Joshua Hoblitt
eeda4f331e