Wrong grid color property on mod exemple `custom_theme.js`

[cesclass]

The usage of the "grid" property cause an ingame red grid.

shapez.io/mod_examples/custom_theme.js

Lines 26 to 32 in 0713c85

	const RESOURCES = {
	"my-theme.json": {
	map: {
	background: "#abc",
	grid: "#ccc",
	gridLineWidth: 1,

It's necessary to use the "gridRegular" and "gridPlacing" propertys instead.

shapez.io/src/js/game/themes/dark.json

Lines 1 to 8 in 0713c85

	{
	"map": {
	"background": "#3e3f47",
	"gridRegular": "rgba(255, 255, 255, 0.02)",
	"gridPlacing": "rgba(255, 255, 255, 0.06)",
	"gridLineWidth": 0.5,

So, I think that the exemple need to be updated.