Add allthingsgit Podcast (#4470)

Co-authored-by: sarit <sarit.pinhas@duda.co>

free-podcasts-screencasts-en.md

@@ -100,6 +100,7 @@
 
 ### Git
 
+* [All Things Git](https://www.allthingsgit.com) - Edward Thomson and Martin Woodward (podcast)
 * [GitMinutes](http://www.gitminutes.com) (podcast)
 * [Jhan Carlos Silva - Git and Github Tutorial](https://www.youtube.com/watch?v=NPRUsCcZwJ4) (screencast)
 * [The Coding Train - Git and GitHub for Poets](https://www.youtube.com/playlist?list=PLRqwX-V7Uu6ZF9C0YMKuns9sLDzK6zoiV) (screencast)