make lipu date come only from lipu_ale.yaml

[alifeee]

Issue dates (e.g., nanpa jaki release date) comes from two sources:

one for the main page, in lipu_ale.yaml

liputenpo.org/_data/lipu_ale.yaml

Lines 1 to 7 in 6dcca6c

	- id: 26
	title: nanpa jaki
	date: 2024-05-14
	pdf: "0026jaki.pdf"
	pdf_pf: "0026jaki_pf.pdf"
	pdf_bwpf: "0026jaki_bwpf.pdf"
	cover_image: "0026jaki_sinpin.png"

secondly for the toki from the issue, in the eleventydata file:

liputenpo.org/toki/nanpa-jaki/nanpa-jaki.11tydata.json

Lines 1 to 6 in 6dcca6c

	{
	"tags": [
	"nanpa jaki"
	],
	"date": "2023-05-14"
	}

It's quite easy for these to be different. It would be nice if the toki could grab the date from the global data file, but I am not sure how to do this with Eleventy just yet.