Move expedition rewards loading to `debug`

src/main/java/emu/grasscutter/game/expedition/ExpeditionManager.java

@@ -40,7 +40,7 @@ public class ExpeditionManager {
                 for (ExpeditionRewardInfo di : banners) {
                     getExpeditionRewardDataList().put(di.getExpId(), di.getExpeditionRewardDataList());
                 }
-                Grasscutter.getLogger().info("Expedition reward successfully loaded.");
+                Grasscutter.getLogger().debug("Expedition reward successfully loaded.");
             } else {
                 Grasscutter.getLogger().error("Unable to load expedition reward. Expedition reward size is 0.");
             }