[stable/2023.1] [PS-292] fix: image: bump neutron policy server version (#1815)

This is an automated cherry-pick of #1803
/assign ricolin
diff --git a/images/neutron/Dockerfile b/images/neutron/Dockerfile
index 4966c28..e97e6d3 100644
--- a/images/neutron/Dockerfile
+++ b/images/neutron/Dockerfile
@@ -10,7 +10,7 @@
 ARG NEUTRON_VPNAAS_GIT_REF=25a6800815a8592df57f81cf310c8a6fd78e0b70
 ADD --keep-git-dir=true https://opendev.org/openstack/neutron-vpnaas.git#${NEUTRON_VPNAAS_GIT_REF} /src/neutron-vpnaas
 RUN git -C /src/neutron-vpnaas fetch --unshallow
-ARG POLICY_SERVER_GIT_REF=4a86b140d5510823a8fb8a59137feddf5b111b26
+ARG POLICY_SERVER_GIT_REF=85f47edbcf66aaf3a289dc3ae76191adce91018f
 ADD --keep-git-dir=true https://github.com/vexxhost/neutron-policy-server.git#${POLICY_SERVER_GIT_REF} /src/neutron-policy-server
 RUN git -C /src/neutron-policy-server fetch --unshallow
 ARG LOG_PASER_GIT_REF=3bc113d9fc0eb3264feca5900e550f6ed15503c2