Ensure spawn radius is always 0 on the client's end

Fixes #1496 to the best of my knowledge. Any issue regarding the spawnpoint being off in terms of radius is up to the server at this point - would not be an us situation here.

connector/src/main/java/org/geysermc/connector/network/session/GeyserSession.java

@@ -385,6 +385,8 @@ public class GeyserSession implements CommandSender {
         // Don't let the client modify the inventory on death
         // Setting this to true allows keep inventory to work if enabled but doesn't break functionality being false
         gamerulePacket.getGameRules().add(new GameRuleData<>("keepinventory", true));
+        // Ensure client doesn't try and do anything funky; the server handles this for us
+        gamerulePacket.getGameRules().add(new GameRuleData<>("spawnradius", 0));
         upstream.sendPacket(gamerulePacket);
     }