Update automerge.yml

Author: David Thrower

.github/workflows/automerge.yml

@@ -50,5 +50,5 @@ jobs:
     #   timeout-minutes: 90
     #  run: python3 cifar10-example.py
     - name: Test image classifier EfficientNetv2S - small subset of CIFAR10
-      timeout-minutes: 120
+      timeout-minutes: 240
       run: python3 cifar-10-efficientnetv2s.py