Re: [PATCH] docs: mention MyFirstContribution in more places

> While the MyFirstContribution guide exists and has received some use and
> positive reviews, it is still not as discoverable as it could be. Add a
> reference to it from the GitHub pull request template, where many
> brand-new contributors may look. Also add a reference to it in
> SubmittingPatches, which is the central source of guidance for patch
> contribution.
>
> Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
> ---
>  .github/CONTRIBUTING.md         | 3 +++
>  Documentation/SubmittingPatches | 5 +++--
>  2 files changed, 6 insertions(+), 2 deletions(-)

> --- a/.github/CONTRIBUTING.md
> +++ b/.github/CONTRIBUTING.md
> @@ -16,4 +16,7 @@ If you prefer video, then [this talk](https://www.youtube.com/watch?v=Q7i_qQW__q
>  might be useful to you as the presenter walks you through the contribution
>  process by example.
>  
> +Or, you can follow the ["My First Contribution"](https://git-scm.com/docs/MyFirstContribution)
> +tutorial for another example of the contribution process.
> +
>  Your friendly Git community!

> --- a/Documentation/SubmittingPatches
> +++ b/Documentation/SubmittingPatches
> @@ -3,8 +3,9 @@ Submitting Patches
>  
>  == Guidelines
>  
> -Here are some guidelines for people who want to contribute their code
> -to this software.
> +Here are some guidelines for people who want to contribute their code to this
> +software. There is also an link:MyFirstContribution.html[interactive tutorial]
> +available which covers many of these same guidelines.