Update repositories.txt

[ElectroMagus]

No description provided.

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/ElectroMagus/ESP32MX1508:

Linting library in ESP32MX1508
WARNING: A commonly misspelled word was found in the library.properties paragraph field. Suggested correction: ESP32    
         Arduino Library for MX1508 based on the AVR Library by Chen Saetern (https://github.com/Saeterncj/MX1508) (Rule
         LP035)                                                                                                         
WARNING: No license file found. See:                                                                                                                  
         https://docs.github.com/en/free-pro-team@latest/github/creating-cloning-and-archiving-repositories/licensing-a-repository#detecting-a-license
         (Rule LD002)                                                                                                                                 

Linter results for project: 0 ERRORS, 2 WARNINGS

-------------------

Linting sketch in ESP32MX1508/examples/basic
WARNING: Sketch file/folder name mismatch. The primary sketch file name must match the folder: basic.ino. See:          
         https://arduino.github.io/arduino-cli/latest/sketch-specification/#primary-sketch-file (Rule SS001)            

Linter results for project: 0 ERRORS, 1 WARNINGS

-------------------

Linter results for projects: 0 ERRORS, 3 WARNINGS

[github-actions]

Your submission has now been accepted! Thanks for your contribution to the Arduino Library Manager index.

The library(s) will be available for installation via Library Manager within a day's time.

You can check the logs from the Library Manager indexer for your library(s) here:
http://downloads.arduino.cc/libraries/logs/github.com/ElectroMagus/ESP32MX1508/