chore: revert openedx-events version

Author: luisfelipec95

requirements/edx/testing.txt

@@ -1053,7 +1053,7 @@ openedx-django-require==3.0.0
     # via -r requirements/edx/base.txt
 openedx-django-wiki==3.1.1
     # via -r requirements/edx/base.txt
-openedx-events @ git+https://github.com/Pearson-Advance/openedx-events.git@pearson/ulmo#egg=openedx-events
+openedx-events==10.5.0
     # via
     #   -r requirements/edx/base.txt
     #   edx-enterprise