Wrong html_url properties Format in projects metadata

[asyarif93]

Please Update/Remove format from html_url properties

tap-github/tap_github/projects.json

Lines 19 to 25 in a7d7666

	"html_url": {
	"type": [
	"null",
	"string"
	],
	"format": "date-time"
	},

as it make parsing error when using target to postgres.
Thank you