[dts] [PATCH] test_plans: fix sphinx-build warning

[Tu, Lijuan]

> -----Original Message-----
> From: Tu, Lijuan <lijuan.tu at intel.com>
> Sent: 2021年7月30日 6:37
> To: dts at dpdk.org
> Cc: Tu, Lijuan <lijuan.tu at intel.com>
> Subject: [PATCH] test_plans: fix sphinx-build warning
> 
> Signed-off-by: Lijuan Tu <lijuan.tu at intel.com>

Applied