Update and add new app

ReadMe.md

@@ -22,7 +22,7 @@ I have decided to not include the "integrated/bundled" FAP files that come with
 
 The Flipper and its community wouldn't be as rich as it is without your contributions and support. Thank you for all you have done.
 
-### Apps checked & updated at `16 Mar 00:38 GMT +3`
+### Apps checked & updated at `16 Mar 18:28 GMT +3`
 
 ## Games
 - [Pong (By nmrr)](https://github.com/nmrr/flipperzero-pong) - Modified by [SimplyMinimal](https://github.com/SimplyMinimal/FlipperZero-Pong)
@@ -81,6 +81,7 @@ The Flipper and its community wouldn't be as rich as it is without your contribu
 - [ESP32CAM QR Code (By eried)](https://github.com/eried/flipperzero-mayhem)
 - [RCWL-516 Motion Sensor (By ahmedafe1)](https://github.com/ahmedafe1/rcwl_0516-Flipperzero)
 - [Logic analyzer (By g3gg0)](https://github.com/g3gg0/flipper-logic_analyzer) -> [How to use](https://github.com/g3gg0/flipper-logic_analyzer#readme)
+- [ServoTester (By spin7ion)](https://github.com/spin7ion/flipper-servotester)
 
 ## Tools / Misc
 - [Paint (By n-o-T-I-n-s-a-n-e)](https://github.com/n-o-T-I-n-s-a-n-e)