rn-75: add small GSoC 2021 article

Author: chriscool

rev_news/drafts/edition-75.md

@@ -17,9 +17,22 @@ This edition covers what happened during the month of April 2021.
 
 ## Discussions
 
-<!---
 ### General
--->
+
+*[Git participates in GSoC (Google Summer of Code) 2021](https://summerofcode.withgoogle.com/organizations/5908380398387200/#projects)
+
+ The following two students have been officially accepted to work on Git
+ as part of the [GSoC 2021](https://summerofcode.withgoogle.com/):
+
+- ZheNing Hu will work on the
+[Use ref-filter formats in git cat-file](https://summerofcode.withgoogle.com/projects/#6499923274498048)
+ project. He will be co-mentored by Hariom Verma and Christian
+ Couder. His first blog post about it [is up](https://adlternative.github.io/GSOC-Git-Blog-1/).
+
+- Atharva Raykar will work on the
+[Finish converting submodule to builtin](https://summerofcode.withgoogle.com/projects/#4754589292691456)
+ project. He will be co-mentored by Shourya Shukla and Christian
+ Couder. His first blog posts about it are [also up](https://atharvaraykar.me/gitnotes/).
 
 ### Reviews