Update GitHub workflows to use concurrency

[Ryan Conway]

Why

The cancel-workflow action added a warning on their README that GitHub now supports concurrency and this workflow might not be needed anymore.

Resource: https://docs.github.com/en/actions/using-jobs/using-concurrency
Sample implementation: nimblehq/rails-templates#398

Acceptance Criteria

• Use concurrency attributes in workflows to ensure only one job is run for each workflow
• Apply update to both .github and .cicdtemplate/.github workflows
• Do not cancel workflows for deployment jobs:
  • .github/workflows/publish_docs_to_wiki
  • .cicdtemplate/.github/workflows/deploy_staging_and_production_to_firebase_app_distribution.yml

Who Benefits?

Developers

[Luong Vo (Lucas)]

Hi @ryan-conway We should push to work on this feature soon. This would help to reduce the action time & billing cost. cc @nimblehq/chapter-android