[dpdk-web] [PATCH v2] add release dates template for the year

[Thomas Monjalon]

15/10/2019 15:05, Ferruh Yigit:
> --- a/content/roadmap/_index.md
> +++ b/content/roadmap/_index.md
> +#### 20.05
> +
> +- Release: May 2020
> +
> +#### 20.08
> +
> +- Release: August 2020
> +
> +#### 20.11
> +
> +- Release: November 2020
> +

I am not very satisfied with this schedule,
but I apply as it is the community consensus.

Hope we'll move to 3 releases (.04, .08, .12) in 2021.