Removes Django<2.1 constrains

(cherry picked from commit 39e117020a9be8d073fd8ec9383e62b582095cb2)

openstack-dashboard.spec

@@ -1,7 +1,7 @@
 %{!?upstream_version: %global upstream_version %{version}%{?milestone}}
 Name:       openstack-dashboard
 Version:    16.2.2
-Release:    3
+Release:    4
 Summary:    OpenStack Dashboard (Horizon)
 License:    Apache-2.0 and BSD
 URL:        http://horizon.openstack.org/
@@ -172,6 +172,7 @@ This package contains the python library.
 
 %prep
 %autosetup -n horizon-%{upstream_version} -S git
+sed -i 's/Django<2.1,/Django/' requirements.txt
 
 # customize default settings
 # WAS [PATCH] disable debug, move web root
@@ -344,6 +345,9 @@ systemctl daemon-reload >/dev/null 2>&1 || :
 %{python3_sitelib}/openstack_auth
 
 %changelog
+* Tue Nov 23 2021 huangtianhua <huangtianhua@huawei.com> - 16.2.2-4
+- Removes Django<2.1 constrains
+
 * Fri Nov 19 2021 huangtianhua <huangtianhua@huawei.com> - 16.2.2-3
 - Adds python3-pint as requires