Add timeouts to the alpha job.

The alpha job has been running for 360 minutes for the last few nights, so I’m pushing this directly to stop the bleeding while debugging the problem.

.github/workflows/alpha.yml

@@ -33,6 +33,7 @@ jobs:
   make-alpha:
     runs-on: macos-13
     name: Make TestFlight Alpha Build
+    timeout-minutes: 30
 
     env:
       destination: ${{ github.event.inputs.destination || inputs.destination }}