fix(ci): pass explicit version to demo server update

Previously the workflow ran install.sh without --version, which caused it
to download the latest stable release instead of the target release tag.

This was causing the demo server to downgrade from RC versions to stable
when triggered via workflow_dispatch.

.github/workflows/update-demo-server.yml

@@ -117,8 +117,9 @@ jobs:
       - name: Update demo server
         if: steps.gate.outputs.skip != 'true' && steps.current.outputs.skip_current != 'true'
         run: |
+          TAG="${{ steps.target.outputs.tag }}"
           ssh -i ~/.ssh/id_ed25519 ${{ secrets.DEMO_SERVER_USER }}@${{ secrets.DEMO_SERVER_HOST }} \
-            'curl -fsSL https://raw.githubusercontent.com/rcourtman/Pulse/main/install.sh | sudo bash'
+            "curl -fsSL https://raw.githubusercontent.com/rcourtman/Pulse/main/install.sh | sudo bash -s -- --version $TAG"
 
       - name: Verify update
         if: steps.gate.outputs.skip != 'true' && steps.current.outputs.skip_current != 'true'