feat: switch extension updates to COS

tests/update-config.test.ts

@@ -0,0 +1,11 @@
+import { describe, expect, test } from "vitest";
+
+import { UPDATE_MANIFEST_URL } from "../src/shared/update-config";
+
+describe("update-config", () => {
+  test("points popup update checks at the COS latest manifest", () => {
+    expect(UPDATE_MANIFEST_URL).toBe(
+      "https://wksgx-1343191620.cos.ap-nanjing.myqcloud.com/star-chart-search-enhancer/latest.json"
+    );
+  });
+});