chore(ci): auto assign issues

[liamdebeasi]

To make it easy for the team to quickly triage issues, we'd like to automatically assign issues to team members at random. This PR use https://github.com/marketplace/actions/auto-assign-issue to assign 1 member of the framework GitHub team to be the person to triage.

[mapsandapps]

the docs say

if using the teams input parameter, you need to use a personal access token with read:org scope (the default GITHUB_TOKEN is not enough).

so I don't know if this will work? But we can always merge it and see.

[liamdebeasi]

Thank you! I wanted to use the Ionitron token but I mis-remembered what it was called 🤦

edit: fixed f57c07e