Issue urgency functionality in the ICDS GitHub project is no longer working

### Summary of the bug

The functionality in our GitHub project which adds an urgency tag to issues is no longer working. It should take the urgency the customer has entered in the Urgency field and apply the relevant tag to the ticket.

### 🪜 How to reproduce

Can be tested by creating an issue and selecting an urgency. I tried it and the ["Add issue urgency" workflow failed](https://github.com/mi6/ic-ui-kit/actions/runs/26288070008).

### 🧐 Expected behaviour

The correct urgency tag should automatically be applied to the ticket.

### Additional info

I believe this might be related to the changes we made recently to the issue templates: #4405, #4394 and mi6/ic-design-system#1828 - which involved changing the urgency field from markdown to a dropdown.

See [add-issue-urgency.yml](https://github.com/mi6/ic-ui-kit/blob/main/.github/workflows/add-issue-urgency.yml). I think we might have to use a different GitHub Action or configure the current one differently if possible.

Inspect .github/workflows/add-issue-urgency.yml and the failed workflow run linked in the issue, then compare how the urgency field changed in #4405, #4394, and ic-design-system#1828. Confirm the workflow works with the dropdown-based Urgency field and applies the correct urgency tag when an issue is created.

Written by the indexing model from the issue text.