Updating tcpconnlat example to include min_ms

tools/tcpconnlat_example.txt

@@ -34,10 +34,13 @@ if the response is a RST (port closed).
 USAGE message:
 
 # ./tcpconnlat -h
-usage: tcpconnlat [-h] [-t] [-p PID]
+usage: tcpconnlat [-h] [-t] [-p PID] [min_ms]
 
 Trace TCP connects and show connection latency
 
+positional arguments:
+  min_ms             minimum duration to trace, in ms (default 0)
+
 optional arguments:
   -h, --help         show this help message and exit
   -t, --timestamp    include timestamp on output