Point template CD to platform-test (#251)

## Ticket

[Resolves Issue 8](navapbc/platform-cli#8)

## Changes

- Updated CD workflows in template-application-flask to deploy to the
consolidated platform-test repository

## Context for reviewers

<img width="1466" height="515" alt="image"
src="https://github.com/user-attachments/assets/c5592955-8243-432d-a9e2-4bcf11bbdd7c"
/>

## Testing

> Provide evidence that the code works as expected. Explain what was
done for testing and the results of the test plan. Include screenshots,
[GIF demos](https://www.cockos.com/licecap/), shell commands or output
to help show the changes working as expected. ProTip: you can drag and
drop or paste images into this textbox.

Co-authored-by: Sean Thomas <sean.thomas@navapbc.com>

Author: sean-navapbc

.github/workflows/cd.yml

@@ -23,7 +23,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           path: project-repo
-          repository: navapbc/platform-test-flask
+          repository: navapbc/platform-test
           token: ${{ secrets.PLATFORM_BOT_GITHUB_TOKEN }}
 
       - name: Set up Python
@@ -42,7 +42,7 @@ jobs:
 
       - name: Update application template
         working-directory: project-repo
-        run: nava-platform app update --template-uri ${{ github.server_url }}/${{ github.repository }} --version HEAD . app
+        run: nava-platform app update --template-uri ${{ github.server_url }}/${{ github.repository }} --version HEAD . app-flask
 
       - name: Push changes to project repo
         working-directory: project-repo