fix package reference to city-scrapers-core in Pipfile

[rhetr]

the city-scrapers-core package in the Pipfile is currently not referencing the latest git revision, which causes problems with scrapy validate. I'm updating the reference to be the same as the atl scraper in #1040, which should work for now; however, according to this deprecation notice, we will need to adjust the reference to be compliant by pip25:

PipDeprecationWarning: DEPRECATION: git+https://github.com/City-Bureau/city-scrapers-core.git@main#egg=city-scrapers-core[azure]
contains an egg fragment with a non-PEP 508 name pip 25.0 will enforce this behaviour change. A possible replacement is to use the req @ url syntax, and remove the egg fragment. Discussion can be found at https://github.com/pypa/pip/issues/11617