Resolve ""substitution" is missspelled as "substition" in urls"

Closes #174 (closed)

aleksis/apps/chronos/urls.py

@@ -34,12 +34,12 @@ urlpatterns = [
         name="lessons_day_by_date",
     ),
     path(
-        "lessons/<int:id_>/<int:week>/substition/",
+        "lessons/<int:id_>/<int:week>/substitution/",
         views.edit_substitution,
         name="edit_substitution",
     ),
     path(
-        "lessons/<int:id_>/<int:week>/substition/delete/",
+        "lessons/<int:id_>/<int:week>/substitution/delete/",
         views.delete_substitution,
         name="delete_substitution",
     ),