Update ViaVersion api usage to be compatible with ViaVersion 4.10 (#4606)

bootstrap/spigot/src/main/java/org/geysermc/geyser/platform/spigot/world/manager/GeyserSpigotLegacyNativeWorldManager.java

@@ -58,7 +58,7 @@ public class GeyserSpigotLegacyNativeWorldManager extends GeyserSpigotNativeWorl
             int newBlockId = oldBlockId;
             // protocolList should *not* be null; we checked for that before initializing this class
             for (int i = protocolList.size() - 1; i >= 0; i--) {
-                MappingData mappingData = protocolList.get(i).getProtocol().getMappingData();
+                MappingData mappingData = protocolList.get(i).protocol().getMappingData();
                 if (mappingData != null) {
                     newBlockId = mappingData.getNewBlockStateId(newBlockId);
                 }