fix: Remove /r in Mojang publickey string.

Author: MerchantCalico

src/main/java/net/modgarden/backend/handler/v1/discord/DiscordBotOAuthHandler.java

@@ -338,6 +338,7 @@ public static void authMinecraftAccount(Context ctx) {
 
 							key = key.replace("-----BEGIN PUBLIC KEY-----", "")
 									.replaceAll("\n", "")
+									.replaceAll("\r", "")
 									.replace("-----END PUBLIC KEY-----", "");
 
 							byte[] bytes = Base64.getDecoder().decode(key);