Fix no-op isort command in github checks

Author: marcharper

.github/workflows/config.yml

@@ -50,7 +50,7 @@ jobs:
     - name: Check imports are sorted
       run: |
         python -m pip install isort
-        python -m isort --check-only
+        python -m isort --check-only --recursive axelrod/.
     - name: Check that all strategies are indexed
       run: |
         python run_strategy_indexer.py

axelrod/tests/unit/test_makes_use_of.py

@@ -7,7 +7,7 @@
     class_makes_use_of,
     makes_use_of,
     makes_use_of_variant,
-    method_makes_use_of
+    method_makes_use_of,
 )
 from axelrod.strategy_transformers import final_sequence