fix SYNC-4566: Change the path for end to end testci builds. (#816)

This fixes the path for the end to end docker image that gets built on
CI.

This is building fine on CI but we are getting an error that will need
to be fixed first: https://mozilla-hub.atlassian.net/browse/SYNC-4567

.circleci/config.yml

@@ -482,7 +482,7 @@ workflows:
       - build-test-container:
           name: Build End-To-End Test Image
           image: autopush-end-to-end-tests
-          path: end-to-end
+          path: notification
           filters:
             tags:
               only: /.*/