Fix paper adapter lookup

Author: onebeastchris

paper/all/src/main/java/org/geysermc/geyser/adapters/paper/PaperAdapters.java

@@ -43,8 +43,9 @@ public static void registerClosestWorldAdapter(int version) throws Exception {
         }
 
         int closest = Arrays.stream(protocols)
-                .reduce((a, b) -> Math.abs(a - version) < Math.abs(b - version) ? a : b)
-                .orElse(protocols[0]);
+                .filter(v -> v <= version)
+                .max()
+                .orElseThrow(() -> new IllegalArgumentException("No compatible protocol found for " + version + "!"));
 
         registerWorldAdapter(closest);
     }