doc: fix telemetry example in cryptodev guide

Blank line added to the final telemetry example for the
cryptography device library as to fix the example
rendering.

Fixes: 1c559ee ("cryptodev: add telemetry endpoint for capabilities")
Cc: stable@dpdk.org

Signed-off-by: Sean Morrissey <sean.morrissey@intel.com>
Acked-by: Ciara Power <ciara.power@intel.com>

doc/guides/prog_guide/cryptodev_lib.rst

@@ -1211,6 +1211,7 @@ are shown below.
      "enqueue_err_count": 0, "dequeue_err_count": 0}}
 
 #. Get the capabilities of a particular Crypto device::
+
      --> /cryptodev/caps,0
      {"/cryptodev/caps": {"crypto_caps": [<array of serialized bytes of
      capabilities>], "crypto_caps_n": <number of capabilities>}}