link the upstream issue

Author: basnijholt

adaptive/tests/test_learners.py

@@ -30,7 +30,7 @@
 try:
     from adaptive.learner.skopt_learner import SKOptLearner
 except (ModuleNotFoundError, ImportError):
-    # XXX: catch the ImportError because of https://github.com/python-adaptive/adaptive/pull/278
+    # XXX: catch the ImportError because of https://github.com/scikit-optimize/scikit-optimize/issues/902
     SKOptLearner = None