Update roles based on governance: (#169)

## Description

<!--- Please describe what this PR is going to change -->
https://github.com/tinkerbell/org/blob/main/GOVERNANCE.md Updating roles
based on contributions over the last 8 months. See the tinkerbell/org
repo and the devstats.sh script to see the data.

## Why is this needed

<!--- Link to issue you have raised -->

Fixes: #

## How Has This Been Tested?
<!--- Please describe in detail how you tested your changes. -->
<!--- Include details of your testing environment, and the tests you ran
to -->
<!--- see how your change affects other areas of the code, etc. -->


## How are existing users impacted? What migration steps/scripts do we
need?

<!--- Fixes a bug, unblocks installation, removes a component of the
stack etc -->
<!--- Requires a DB migration script, etc. -->


## Checklist:

I have:

- [ ] updated the documentation and/or roadmap (if required)
- [ ] added unit or e2e tests
- [ ] provided instructions on how to upgrade

.github/CODEOWNERS

@@ -1,2 +1,2 @@
-/.github/settings.yml @thebsdbox @mmlb
-/.github/CODEOWNERS @thebsdbox @mmlb
+/.github/settings.yml @chrisdoherty4 @jacobweinstock
+/.github/CODEOWNERS @chrisdoherty4 @jacobweinstock

.github/settings.yml

@@ -2,24 +2,12 @@
 # See https://docs.github.com/en/rest/reference/repos#add-a-repository-collaborator for available options
 collaborators:
   # Maintainers, should also be added to the .github/CODEOWNERS file as owners of this settings.yml file.
-  - username: mmlb
-    permission: maintain
-  - username: thebsdbox
-    permission: maintain
   - username: chrisdoherty4
     permission: maintain
-  # Approvers
   - username: jacobweinstock
-    permission: push
-  - username: tstromberg
-    permission: push
-  - username: ScottGarman
-    permission: push
+    permission: maintain
+  # Approvers
   # Reviewers
-  - username: jmpolom
-    permission: triage
-  - username: Raj-Dharwadkar
-    permission: triage
 
   # Note: `permission` is only valid on organization-owned repositories.
   # The permission to grant the collaborator. Can be one of: