fix install issue

openstack-nova.spec

@@ -15,7 +15,7 @@ Name:             openstack-nova
 # Liberty semver reset
 # https://review.openstack.org/#/q/I6a35fa0dda798fad93b804d00a46af80f08d475c,n,z
 Version:          20.6.1
-Release:          2
+Release:          3
 Summary:          OpenStack Compute (nova)
 
 License:          ASL 2.0
@@ -334,6 +334,7 @@ Requires:         python3-paste-deploy
 Requires:         python3-netifaces
 Requires:         python3-retrying
 Requires:         python3-yaml
+Requires:         python3-monotonic
 
 %description -n   python3-nova
 %{common_desc}
@@ -729,6 +730,9 @@ exit 0
 %endif
 
 %changelog
+* Tue Nov 23 2021 zhangy1317 <zhangy1317@foxmail.com> - 20.6.1-3
+- Fix install issue
+
 * Fri Nov 19 2021 huangtianhua <huangtianhua@huawei.com> - 20.6.1-2
 - 20.6.1 doesn't require python-dataclasses, removes it.