[Minor fix] The domain dns.google may cause a socket.gaierror exception (#3176)

Co-authored-by: guofangze <guofangze@kuaishou.com>

vllm/utils.py

@@ -173,7 +173,7 @@ def get_ip() -> str:
     # try ipv4
     s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
     try:
-        s.connect(("dns.google", 80))  # Doesn't need to be reachable
+        s.connect(("8.8.8.8", 80))  # Doesn't need to be reachable
         return s.getsockname()[0]
     except OSError:
         # try ipv6