Update automerge.yml

timeout-minutes increased in workflow file.

Author: david-thrower

.github/workflows/automerge.yml

@@ -36,3 +36,4 @@ jobs:
         # flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
     - name: Test distributed random search Ames by running
       run: python3 ames-wo-val-hyperparam-optimization-local.py
+      timeout-minutes: 420