feat: deploy the sandbox environment for s42 devs (#255)

**Describe the pull request**

With the new IaC, the sandbox is not automated anymore. 

**Breaking changes ?**
no

Signed-off-by: 42Atomys <contact@atomys.fr>

.github/workflows/deploy.yaml

@@ -55,8 +55,9 @@ jobs:
             }
             if (context.eventName == 'push' && context.ref == 'refs/heads/main' ) {
               stacks.push('sandbox');
+            } else {
+              stacks.push('apps');
             }
-            stacks.push('apps');
 
             console.log(`Stack to deploy: ${stacks}`);
             core.setOutput('stacks', stacks);