OWDifferentialExpression: fix import for widget report

As of biolab/orange3#3772 widget report is no longer in Orange.canvas.report

Author: JakaKokosar

orangecontrib/bioinformatics/widgets/OWDifferentialExpression.py

@@ -14,12 +14,13 @@
     Qt, pyqtSignal as Signal, pyqtSlot as Slot, QSize, QRectF, QLineF
 )
 
-from Orange.canvas.report import report
 from Orange.preprocess import transformation
 from Orange.widgets import widget, gui, settings
 from Orange.widgets.utils import concurrent
 from Orange.widgets.utils.datacaching import data_hints
 
+from orangewidget.report import report
+
 from orangecontrib.bioinformatics.widgets.utils.settings import SetContextHandler
 from orangecontrib.bioinformatics.widgets.utils import gui as guiutils
 from orangecontrib.bioinformatics.utils.statistics import score_hypergeometric_test