Ignore a particular ansible-core vulnerability

This is being done only temporarily, and only because there is no
recent version of ansible-core that does not exhibit the
vulnerability.  Without this change we get a failure from the
pip-audit pre-commit hook that we cannot do anything about.

See #380 for more details.

.pre-commit-config.yaml

@@ -161,6 +161,11 @@ repos:
     hooks:
       - id: pip-audit
         args:
+          # We have to ignore this particular vulnerability in
+          # ansible-core>=2.11 as there is currently no fix.  See
+          # cisagov/skeleton-packer#380 for more details.
+          - --ignore-vuln
+          - GHSA-99w6-3xph-cx78
           # Add any pip requirements files to scan
           - --requirement
           - requirements-dev.txt