Switch from sha256sum to sha512sum

Not needed but it will be consistant with the launcher itself

src/app/page.tsx

@@ -111,7 +111,7 @@ export default function Home () {
 
     const findUrl = (plat: string) => {
       const i = version.platforms.indexOf(plat)
-      return i >= 0 ? version.sha256sums[i] : undefined
+      return i >= 0 ? version.sha512sums[i] : undefined
     }
 
     if (p === 'windows') {

src/app/types/LauncherUpdate.ts

@@ -3,5 +3,5 @@ export interface LauncherUpdate {
     releaseDate: number
     downloadUrls: string[]
     platforms: string[]
-    sha256sums: string[]
+    sha512sums: string[]
 }