Add workflow to update audit expiry

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### Summary
After this [PR contribution](https://github.com/mi6/ic-ui-kit/pull/4178), we will have a script that we can manually run to update the audit expiry dates. However, these sometimes catch us out. It would be good if we could have a workflow that runs daily and checks if `npm run audit-expiry` fails, and then if it does, run the new `audit:update` script.

### 💬 Description
List of actions the workflow should do:
- Run `npm run audit-expiry`
- Run `npm run audit:update`
- Commit those changes to `chore(root)`
- Create a PR to develop

### 💰 Use value
It would save developers a job that happens monthly.

### 🚨 Urgency (low, medium or high)
Low

### Additional info
I've suggested running the workflow daily, but realistically if we keep adding a month to the date then the day won't actually change so we could just run it every 25th.

Looks like we can use schedule cron - https://jasonet.co/posts/scheduled-actions/

Start by inspecting the package scripts behind `npm run audit-expiry` and `npm run audit:update`, then review the repository's existing workflow conventions. Confirm the scheduled job runs on the intended cadence, updates expiry dates only when the check fails, commits the changes as `chore(root)`, and creates a PR targeting `develop`.

Written by the indexing model from the issue text.