devel/py-pydantic-yaml: Allow build with py-ruamel.yaml 0.19.0+
- Bump PORTREVISION for package change
It fixes build after 7e7493383b5e027b27e9136282856b66b1d2fa3d.
Reported by: pkg-fallout
(cherry picked from commit 7ed18480dcc71a1aaea178f8010aff94404e98d4)