Remove CVE-2024-36039 from whitelist

Remove CVE-2024-36039 from the Trivy whitelist and move to the
example file setup to illustrate the global_allowed_vulnerabilities
variable can be used to whitelist vulnerabilities in all images.

(cherry picked from commit 8ed7e8a)

Author: assumptionsandg

etc/kayobe/trivy/allowed-vulnerabilities.yml

@@ -4,15 +4,15 @@
 
 # Example allowed vulnerabilities file setup
 #
+# global_allowed_vulnerabilities:
+#   - CVE-2024-36039
+#
 # keystone_allowed_vulnerabilities:
 #   - CVE-2022-2447
 #
 # barbican_api_allowed_vulnerabilities:
 #   - CVE-2023-31047
 
-global_allowed_vulnerabilities:
-  - CVE-2024-36039
-
 ###############################################################################
 # Dummy variable to allow Ansible to accept this file.
 workaround_ansible_issue_8743: yes