Add bash screencast

free-podcasts-screencasts-ru.md

@@ -1,5 +1,6 @@
 ### Index
 
+* [Bash](#bash)
 * [Golang](#golang)
 * [Java](#java)
 * [Javascript](#javascript)
@@ -9,6 +10,11 @@
 * [Webpack](#webpack)
 
 
+### Bash
+
+* [Screencast] - [Bash: Основы командной строки](https://ru.hexlet.io/courses/bash)
+
+
 ### Golang
 
 * [Podcast] - [GolangShow](https://golangshow.com)