doc: fix a typo
doc: fix a typo

Signed-off-by: Jincheng Miao <8601f959b56f7ea8d391e3f9ac1778cb4d6b8380@redhat.com>
Acked-by: Bernard Iremonger <233eeff376ad0c06f66f06c5522ea3c4feb30d3b@intel.com>

mixja/dpdk,tsphillips/dpdk-fork,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,msune/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,msune/dpdk,venkynv/dpdk-mirror,venkynv/dpdk-mirror,tsphillips/dpdk-fork,mixja/dpdk,venkynv/dpdk-mirror,msune/dpdk,mixja/dpdk,tsphillips/dpdk-fork,tsphillips/dpdk-fork,msune/dpdk,venkynv/dpdk-mirror,mixja/dpdk