Update maintainers list of devfile registry helm chart

[michael-valdron]

Which area/kind this issue is related to?

/area registry

Issue Description

The list of maintainers under the Chart.yaml file should be updated to sync with the list of maintainers under the registry operator CSV. Maintainers list under Chart.yaml should also include emails.

Parent Epic: #1274

Acceptance Criteria

• Update list of maintainers to match the one under registry operator
• Include emails of maintainers