NSF Award Link

[braughtg]

Make the text "DUE-2013069" into a link to the award in the Acknowledgments section at the bottom of the README.md file.

The URL to use for the link is: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2013069

The "Links" section of the following document shows how to create a link using Markdown:

• https://docs.github.com/en/github/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax

[allisons9988]

I'll work on this issue.

[Trangvu801]

I would love to work on this issue.

[tripletm]

I will work on this issue

[minhphung152]

I'll work on this issue.

[nghtlinh]

I would like to work on this issue!

[calebloring]

I would like to work on this issue.