fix swift keystone auth url

Closes-Bug: #2060121

Bug introduced in https://review.opendev.org/c/openstack/kolla-ansible/+/843748



Signed-off-by: Sven Kieske <kieske@osism.tech>
Change-Id: Ibdf107d27f1523d57787726685f68ff27e9db7bc

ansible/roles/swift/templates/proxy-server.conf.j2

@@ -99,5 +99,5 @@ use = egg:swift#s3api
 
 [filter:s3token]
 use = egg:swift#s3token
-auth_uri = {{ keystone_internal_url }}
+auth_uri = {{ keystone_internal_url }}/v3
 {% endif %}