fix: use regional season info instead of hard-coded NA

src/core/blitz/getRatingsInfo.ts

@@ -0,0 +1,12 @@
+import { RatingsInfo } from '../../commands/ratings';
+import { Region } from '../../constants/regions';
+import regionToRegionSubdomain from './regionToRegionSubdomain';
+
+export default async function getRatingsInfo(region: Region) {
+  const response = await fetch(
+    `https://${regionToRegionSubdomain(
+      region,
+    )}.wotblitz.com/en/api/rating-leaderboards/season/`,
+  );
+  return (await response.json()) as Promise<RatingsInfo>;
+}