Update deploy workflow

- rename to deploy.yaml
- add concurrency group
- update checkout to v4

.github/workflows/space-push.yaml → .github/workflows/deploy.yaml

@@ -1,16 +1,18 @@
-name: Push to Space
+name: Deploy
 on:
   push:
     branches:
       - main
 
+concurrency: deploy
+
 jobs:
   push:
     runs-on: ubuntu-latest
     environment: Testing
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Push to Space
         uses: neobrains/space-deployment-github-action@v0.5