Fix inaccurate comment.

proxy/src/main/java/com/velocitypowered/proxy/Velocity.java

@@ -18,7 +18,7 @@ public class Velocity {
     // sane default.
     //
     // Note: io.netty.allocator.pageSize << io.netty.allocator.maxOrder is the formula used to
-    // compute the chunk size. We lower maxOrder from its default of 11 to 8. (We also use a null
+    // compute the chunk size. We lower maxOrder from its default of 11 to 9. (We also use a null
     // check, so that the user is free to choose another setting if need be.)
     if (System.getProperty("io.netty.allocator.maxOrder") == null) {
       System.setProperty("io.netty.allocator.maxOrder", "9");