I saw a title of Add cert-manager based support for registry+v1 bundles that include webhooks, which doesn't seem to have any of the acceptable prefixes.

You need to have one of these as the prefix of your PR title:

• Breaking change: ⚠ (:warning:)
• Non-breaking feature: ✨ (:sparkles:)
• Patch fix: 🐛 (:bug:)
• Docs: 📖 (:book:)
• Release: 🚀 (:rocket:)
• Infra/Tests/Other: 🌱 (:seedling:)

More details can be found at sigs.k8s.io/kubebuilder-release-tools/VERSIONING.md.