www/py-notebook: Update to 6.4.6

Changes:	https://github.com/jupyter/notebook/releases

www/py-notebook/Makefile

 PORTNAME=	notebook
-PORTVERSION=	6.4.5
+PORTVERSION=	6.4.6
 CATEGORIES=	www python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
@@ -18,9 +18,10 @@ RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}Jinja2>=0:devel/py-Jinja2@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}jupyter-core>=4.6.1:devel/py-jupyter-core@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}nbconvert>=0:devel/py-nbconvert@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}nbformat>=0:devel/py-nbformat@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}nest-asyncio>=1.5:devel/py-nest-asyncio@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}prometheus-client>=0:net-mgmt/py-prometheus-client@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pyzmq>=17:net/py-pyzmq@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}send2trash>=1.5.0:deskutils/py-send2trash@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}send2trash>=1.8.0:deskutils/py-send2trash@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}terminado>=0.8.3:net/py-terminado@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}tornado>=6.1:www/py-tornado@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}traitlets>=4.2.1:devel/py-traitlets@${PY_FLAVOR}

www/py-notebook/distinfo

-TIMESTAMP = 1635181739
-SHA256 (notebook-6.4.5.tar.gz) = 872e20da9ae518bbcac3e4e0092d5bd35454e847dedb8cb9739e9f3b68406be0
-SIZE (notebook-6.4.5.tar.gz) = 14339237
+TIMESTAMP = 1641046848
+SHA256 (notebook-6.4.6.tar.gz) = 7bcdf79bd1cda534735bd9830d2cbedab4ee34d8fe1df6e7b946b3aab0902ba3
+SIZE (notebook-6.4.6.tar.gz) = 14342345