fix wrong typo

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/tests/ssl-opt.sh b/tests/ssl-opt.sh
index ec243ad..c26bbe7 100755
--- a/tests/ssl-opt.sh
+++ b/tests/ssl-opt.sh
@@ -1259,7 +1259,7 @@
     # terminate the server (and the proxy)
     kill $SRV_PID
     # For Ubuntu 22.04, `Terminated` message is outputed by wait command.
-    # To remove it from stdout, redirect stdout/stderr to CLI_OUT
+    # To remove it from stdout, redirect stdout/stderr to SRV_OUT
     wait $SRV_PID >> $SRV_OUT 2>&1
     SRV_RET=$?