chore(deps): bump cert-manager from 1.18.2 to 1.19.4
cert-manager v1.19.0 removed the +groupName=meta.cert-manager.io tag
from pkg/apis/meta/v1/doc.go, causing the OpenAPI generator to produce
invalid Java package paths. Enhanced the parser's groupName() function
to fall back to searching for GroupName constants in the package and
parent directories.
Additionally, cert-manager renamed ObjectReference to IssuerReference
(keeping ObjectReference as a deprecated type alias).
Signed-off-by: Marc Nuri <marc@marcnuri.com>
