Update repositories.txt

[MarcoAntonioGonCas]

LedLib librery added.

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/MarcoAntonioGonCas/LedLib:

Linting library in LedLib
WARNING: A commonly misspelled word was found in the library.properties paragraph field. Suggested correction: LedLib   
         simplifica el control de LEDs, ofrece opciones para prender leds por duraciones especificas, generar patrons de
         parpadeo sin codigo bloqueante.                                                                                
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format         
         (Rule LP035)                                                                                                   
WARNING: No example sketches found. Please provide examples.                                      
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#library-examples
         (Rule LD004)                                                                             

Linter results for project: 0 ERRORS, 2 WARNINGS

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[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/MarcoAntonioGonCas/LedLib/