Added Scala cheatsheet (#8700)

* Added Scala cheatsheet

* Add blank lines

* Update resource name

Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com>

* Correct ordering

Co-authored-by: Sharan J <50091666+shrn01@users.noreply.github.com>

more/free-programming-cheatsheets.md

@@ -40,6 +40,7 @@
 * [Raspberry Pi](#raspberry-pi)
 * [Ruby](#ruby)
 * [Rust](#rust)
+* [Scala](#scala)
 * [Shell Scripting](#shell-scripting)
 * [Solidity](#solidity)
 * [SpringBoot](#springboot)
@@ -381,6 +382,12 @@
 * [Rust Language Cheat Sheet](https://cheats.rs) (HTML)
 
 
+### Scala
+
+* [Scala Cheat Sheet](https://warisradji.com/Scala-CheatSheet) - Waris RADJI (HTML)
+* [Scala Cheatsheet](https://alvinalexander.com/downloads/scala/Scala-Cheat-Sheet-devdaily.pdf) - Alvin Alexander (PDF)
+
+
 ### Shell Scripting
 
 * [Bash Cheatsheet - CheatSheet.Wtf](https://www.cheatsheet.wtf/bash) - smokingcuke (HTML)