update openstack-glance.spec.

依赖写错了，应该是python-sqlalchemy-migrate，修改为正确的

openstack-glance.spec

@@ -12,7 +12,7 @@
 
 Name:           openstack-glance
 Version:        21.0.0
-Release:        1%{?dist}
+Release:        2%{?dist}
 Epoch:          0
 Summary:        OpenStack Image Service (Glance)
 License:        ASL 2.0
@@ -132,7 +132,7 @@ Requires:       python3-pbr
 Requires:       python3-pyOpenSSL
 Requires:       python3-retrying
 Requires:       python3-six
-Requires:       python3-migrate
+Requires:       python3-sqlalchemy-migrate
 Requires:       python3-sqlparse
 Requires:       python3-stevedore
 Requires:       python3-taskflow
@@ -362,3 +362,5 @@ PYTHONPATH=. python3 -m stestr.cli --test-path glance/tests/unit run
 %endif
 
 %changelog
+* Sat Feb 20 2021 zhaorenhai <zhaorenhai@hotmail.com> - 21.0.0-2
+- Fix requires issue of python-migrate