4 themes do not exist in themes/README.md

[178inaba]

Describe the bug

Previews for the four themes ocean_dark, city_lights, github_dark and discord_old_blurple do not exist in themes/README.md.

github-readme-stats/themes/index.js

Lines 273 to 296 in 7907a5d

	ocean_dark: {
	title_color: "8957B2",
	icon_color: "FFFFFF",
	text_color: "92D534",
	bg_color: "151A28",
	},
	city_lights: {
	title_color: "5D8CB3",
	icon_color: "4798FF",
	text_color: "718CA1",
	bg_color: "1D252C",
	},
	github_dark: {
	title_color: "58A6FF",
	icon_color: "1F6FEB",
	text_color: "C3D1D9",
	bg_color: "0D1117",
	},
	discord_old_blurple: {
	title_color: "7289DA",
	icon_color: "7289DA",
	text_color: "FFFFFF",
	bg_color: "2C2F33",
	},

Expected behavior

There are previews of the four themes in README.md.

Additional context

Is the automatic update mechanism stopped?
#890