Add missing _.
Fixes:
2977a13657ab ("doc: fix AESNI_MB guide")
Cc: stable@dpdk.org
Signed-off-by: David Marchand <david.marchand@redhat.com>
library from `here <https://github.com/01org/intel-ipsec-mb>`_
and compile it on their user system before building DPDK.
The latest version of the library supported by this PMD is v0.53, which
-can be downloaded from `<https://github.com/01org/intel-ipsec-mb/archive/v0.53.zip>`.
+can be downloaded from `<https://github.com/01org/intel-ipsec-mb/archive/v0.53.zip>`_.
.. code-block:: console