Merge pull request #321 from rackerlabs/renovate/ironic-python-agent-builder-5.x

chore(deps): update dependency ironic-python-agent-builder to v5.4.0

Author: nicholaskuechler

ironic-images/requirements.txt

@@ -1,4 +1,4 @@
 diskimage-builder==3.34.0
-ironic-python-agent-builder==5.3.0
+ironic-python-agent-builder==5.4.0
 python-keystoneclient==5.4.0
 python-swiftclient==4.6.0