Update killall_sglang.sh (#2397)

scripts/killall_sglang.sh

@@ -4,7 +4,7 @@
 nvidia-smi
 
 # Clean SGLang processes
-kill -9 $(ps aux | grep 'multiprocessing.spawn' | grep -v 'grep' | awk '{print $2}') 2>/dev/null
+kill -9 $(ps aux | grep 'sglang::' | grep -v 'grep' | awk '{print $2}') 2>/dev/null
 kill -9 $(ps aux | grep 'sglang.launch_server' | grep -v 'grep' | awk '{print $2}') 2>/dev/null
 kill -9 $(ps aux | grep 'sglang.bench' | grep -v 'grep' | awk '{print $2}') 2>/dev/null