Install cloud plugin for deploy

Signed-off-by: itowlson <ivan.towlson@fermyon.com>

Author: itowlson

.github/workflows/deploy.yaml

@@ -33,6 +33,7 @@ jobs:
         uses: fermyon/actions/spin/setup@v1
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
+          plugins: cloud
 
       - name: Login to Fermyon Cloud
         run: spin cloud login --token "${{ secrets.FERMYON_CLOUD_TOKEN }}"