[HTML] Link to pre-resized avatar image for better image quality

DiscordChatExporter.Core/Discord/Data/User.cs

@@ -49,10 +49,10 @@ namespace DiscordChatExporter.Core.Discord.Data
         {
             // Animated
             if (avatarHash.StartsWith("a_", StringComparison.Ordinal))
-                return $"https://cdn.discordapp.com/avatars/{id}/{avatarHash}.gif";
+                return $"https://cdn.discordapp.com/avatars/{id}/{avatarHash}.gif?size=40";
 
             // Non-animated
-            return $"https://cdn.discordapp.com/avatars/{id}/{avatarHash}.png";
+            return $"https://cdn.discordapp.com/avatars/{id}/{avatarHash}.png?size=40";
         }
 
         public static User Parse(JsonElement json)