Version warning: browser cache makes it show after release

[ennru]

The version information from paradox.json is cached by browsers, which leads to a version warning after releases.

Adding a parameter to the Javascript get could avoid that in

paradox/themes/generic/src/main/assets/js/warnOldVersion.js

Lines 6 to 7 in 0efc66c

	const url = schemeLessUrl + (schemeLessUrl.endsWith("\/") ? "" : "/") + "paradox.json";
	$.get(url, function (versionData) {

This problem exists in other Paradox templates, as well.