fix: remove the deployed storybook when the PR is closed (#12)

# Description

- Add checkout action

## Reason

It's required for the deployment step to work properly.

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Signed-off-by: Luís Couto <[email protected]>

.github/workflows/on-pull-request-close.yml

@@ -1,4 +1,4 @@
-name: Feature Branch
+name: Feature Branch Closed
 
 on:
   pull_request:
@@ -12,6 +12,11 @@ jobs:
     if: github.event.action == 'closed' && github.event.pull_request.draft == false
     runs-on: ubuntu-20.04
     steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
       - name: Deploy preview
         uses: rossjrw/pr-preview-action@v1
         with: