Lg update pr instructions

[lgibson7]

I made some edits to the PR instructions.

Edits I didn't make but think we should clarify: What is meant by directory name in the saving.R file? Is that the same as the folder they created in their branch? Is the {dataset}.md file generated after running saving.R?

[jonthegeek]

Thanks! Hopefully this will help make it easier for people to contribute!

[jonthegeek]

I made some tweaks:

• The {#whatever} tags aren't necessary in GitHub markdown, and showed up as text in the rendered document
• The line breaks at periods don't display to the viewer, but they make it (much) easier to see changes in PRs, so I added them back in.
• I updated curated/template/instructions.md to match these changes.
• I clarified the folder instructions in saving.R. Good catch!
• I clarified the source of {dataset}.md files, and what {dataset}` means there.

Thanks!

[lgibson7]

Thanks Jon! Yeah, the visual editor made some wonky changes. I deleted the yaml it made but missed the tags.