viaversion 4.10.0 compat, indicate 1.20.6 support on modrinth

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);
                 }

build-logic/src/main/kotlin/geyser.modded-conventions.gradle.kts

@@ -134,6 +134,6 @@ modrinth {
     syncBodyFrom.set(rootProject.file("README.md").readText())
 
     uploadFile.set(tasks.getByPath("remapModrinthJar"))
-    gameVersions.addAll("1.20.5")
+    gameVersions.addAll("1.20.5", "1.20.6")
     failSilently.set(true)
 }