Added cheatsheet for Fish Shell (#7174)

* Added cheatsheet for Fish Shell

* Added Category "Shell Scripting"

* Removed unneeded Indexes

* chore: remove not needed section anchor alias

Co-authored-by: David Ordás <3125580+davorpa@users.noreply.github.com>

more/free-programming-cheatsheets.md

@@ -2,7 +2,6 @@
 
 * [APL](#apl)
 * [Artificial Intelligence](#artificial-intelligence)
-* [Bash](#bash)
 * [C](#c)
 * [C#](#csharp)
 * [C++](#cpp)
@@ -33,6 +32,7 @@
 * [Raspberry Pi](#raspberry-pi)
 * [Ruby](#ruby)
 * [Rust](#rust)
+* [Shell Scripting](#shell-scripting)
 * [Solidity](#solidity)
 * [SQL](#sql)
 * [Tensorflow](#tensorflow)
@@ -51,12 +51,6 @@
 * [What is Artificial Intelligence?](https://intelligencereborn.com/ArtificialIntelligence.html) IntelligenceReborn (HTML)
 
 
-### Bash
-
-* [Bash Cheatsheet - CheatSheet.Wtf](https://www.cheatsheet.wtf/bash) - smokingcuke (HTML)
-* [Bash Scripting cheatsheet](https://devhints.io/bash) Devhints (HTML)
-
-
 ### C
 
 * [C Reference Card (ANSI)](https://users.ece.utexas.edu/~adnan/c-refcard.pdf) (PDF)
@@ -283,6 +277,13 @@
 * [Rust Language Cheat Sheet](https://cheats.rs) (HTML)
 
 
+### Shell Scripting
+
+* [Bash Cheatsheet - CheatSheet.Wtf](https://www.cheatsheet.wtf/bash) - smokingcuke (HTML)
+* [Bash Scripting cheatsheet](https://devhints.io/bash) Devhints (HTML)
+* [Fish Shell cheatsheet](https://devhints.io/fish-shell) - DevHints, Rico Santa Cruz (HTML)
+
+
 ### Solidity
 
 * [Solidity Cheat Sheet](https://intellipaat.com/mediaFiles/2019/03/Solidity-Cheat-Sheet.pdf) - IntelliPaat (PDF)