Use implementation-provided legacy serializer for events

Spigot-Server-Patches/Adventure.patch

@@ -3116,3 +3116,21 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
          StringBuilder out = new StringBuilder();
  
          boolean hadFormat = false;
+diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
++++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
+@@ -0,0 +0,0 @@ public final class CraftMagicNumbers implements UnsafeValues {
+ 
+     private CraftMagicNumbers() {}
+ 
++    // Paper start
++    @Override
++    public net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer legacyComponentSerializer() {
++        return io.papermc.paper.adventure.PaperAdventure.LEGACY_SECTION_UXRC;
++    }
++    // Paper end
++
+     public static IBlockData getBlock(MaterialData material) {
+         return getBlock(material.getItemType(), material.getData());
+     }