refactor: update spawner action logger shutdown message and modify embed title format

Author: ptthanh02

core/src/main/java/github/nighter/smartspawner/logging/SpawnerActionLogger.java

@@ -237,7 +237,5 @@ public void shutdown() {
         if (discordLogger != null) {
             discordLogger.shutdown();
         }
-        
-        plugin.getLogger().info("Spawner action logger shut down successfully");
     }
 }

core/src/main/resources/config.yml

@@ -327,7 +327,7 @@ logging:
     # Discord Embed Configuration
     embed:
       # Embed title (supports placeholders)
-      title: "🔔 Spawner Action Log"
+      title: "SmartSpawner Log - {event_type}"
 
       # Embed description (supports placeholders)
       # Available placeholders: {description}, {event_type}, {player}, {world}, {x}, {y}, {z}, {location}, {entity}, {time}