Chore: Automate info.json artifact for releases

[colinmurphy]

For each release we should be automating creating the info.json for the plugin updater - https://wpe-plugin-updates.wpengine.com/wp-graphql-content-blocks/info.json

Currently implemented on Faust - https://github.com/wpengine/faustjs/blob/canary/.github/scripts/add-wpe-version-info-file.sh and https://github.com/wpengine/faustjs/blob/canary/.github/actions/release-plugin/action.yml#L96-L101