🌱 Update openstack-ironic digest to 1ac9516

Author: renovate[bot]

Dockerfile

@@ -59,7 +59,7 @@ RUN IRONIC_PKG_LIST=/tmp/ironic-deps-list /bin/build-wheels.sh
 FROM $BASE_IMAGE AS ironic-wheel-builder
 
 ARG UPPER_CONSTRAINTS_FILE=upper-constraints.txt
-ARG IRONIC_SOURCE=4d94473d9b8d81eb46a8054442d8f96e84419b92 # master
+ARG IRONIC_SOURCE=1ac9516923445167fb15f0cb547f765c97611845 # master
 ARG SUSHY_SOURCE
 ARG PIP_VERSION
 ARG SETUPTOOLS_VERSION