[FRONTEND] Make deployment with cron job use a "stable" branch

[bcho892]

Is your feature request related to a problem? Please describe.

Right now we possibly deploy broken code to prod if we run it every 30 minutes.

To solve this, we will have to:

1. Create an update-stable workflow that can be triggered via dispatch (when we are sure that master is not broken)
2. The deploy-client-production workflow should NOT target master and instead use the branch called stable.

BEFORE MERGING

• [ ] Storybooks created where possible
• [ ] Tested with nock if data fetching
• [ ] Tests written for critical interactions
• [ ] PR Reviewed (For non-trivial changes)
• [ ] Changes tested after rebasing on master or merging in master (hint: git fetch origin master:master, then git rebase master or git merge master)
• [ ] All required PR checks passing