Fix import and integrate group label
In our async retrospective issues, we noticed that the list of issues that slipped was empty even though it should have listed issues. As an example: https://gitlab.com/gl-retrospectives/manage-stage/import-and-integrate/-/issues/17#issues-that-slipped
The link redirects to https://gitlab.com/groups/gitlab-org/-/issues?label_name%5B%5D=group%3A%3Aimport%2520and%2520integrate&label_name%5B%5D=missed%3A16.11 whereas it should redirect to https://gitlab.com/groups/gitlab-org/-/issues/?sort=created_date&state=opened&label_name%5B%5D=missed%3A16.11&label_name%5B%5D=group%3A%3Aimport%20and%20integrate&first_page_size=20
Note the wrongly escaped group label.
This MR fixes the group label for groupimport and integrate
Edited by Martin Wortschack