doc: fix ethtool app path

[ upstream commit 4a56057 ]

The path to the ethtool application was slightly incorrect in the
documentation. This patch corrects that path.

Fixes: bda68ab ("examples/ethtool: add user-space ethtool sample application")

Signed-off-by: Sarosh Arif <sarosh.arif@emumba.com>

doc/guides/sample_app_ug/ethtool.rst

@@ -24,7 +24,7 @@ The only available options are the standard ones for the EAL:
 
 .. code-block:: console
 
-    ./ethtool-app/ethtool-app/${RTE_TARGET}/ethtool [EAL options]
+    ./ethtool-app/${RTE_TARGET}/ethtool [EAL options]
 
 Refer to the *DPDK Getting Started Guide* for general information on
 running applications and the Environment Abstraction Layer (EAL)