Update repositories.txt

[YoshinobuObata]

No description provided.

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/YUKAI/MakerBoard:

Linting library in MakerBoard
WARNING: A commonly misspelled word was found in the library.properties paragraph field. Suggested correction: Create   
         motor PWM, pin assign abstraction.                                                                             
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format         
         (Rule LP035)                                                                                                   
WARNING: library.properties depends field item(s) MsTImer2 not found in the Library Manager index.             
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP048)                                                                                          

Linter results for project: 0 ERRORS, 2 WARNINGS

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

Linting sketch in MakerBoard/examples/LED

Linter results for project: no errors or warnings

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Linting sketch in MakerBoard/examples/RunMotor

Linter results for project: no errors or warnings

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Linting sketch in MakerBoard/examples/SensorInput

Linter results for project: no errors or warnings

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

Linter results for projects: 0 ERRORS, 2 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/YUKAI/MakerBoard/