devel/py-nbclassic: Update to 0.3.4

Changes:	https://github.com/jupyterlab/nbclassic/releases

devel/py-nbclassic/Makefile

 # Created by: Po-Chuan Hsieh <sunpoet@FreeBSD.org>
 
 PORTNAME=	nbclassic
-PORTVERSION=	0.3.3
+PORTVERSION=	0.3.4
 CATEGORIES=	devel python
 MASTER_SITES=	CHEESESHOP
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}

devel/py-nbclassic/distinfo

-TIMESTAMP = 1635730969
-SHA256 (nbclassic-0.3.3.tar.gz) = c332322864a0bf5866dec3149b4863d092178f144749183a704d39f0ebb7947d
-SIZE (nbclassic-0.3.3.tar.gz) = 23225
+TIMESTAMP = 1635788046
+SHA256 (nbclassic-0.3.4.tar.gz) = f00b07ef4908fc38fd332d2676ccd3ceea5076528feaf21bd27e809ef20f5578
+SIZE (nbclassic-0.3.4.tar.gz) = 23417