Update repositories.txt

[tadfmac]

Hello.

I created a library to addition simple MIDI comminucation to ch55xduino core.
Could you add this to a list of libraries?

url: https://github.com/mimuz/mimuz-ch55x

Thanks.

[github-actions]

❌ ERROR: Arduino Lint found errors with https://github.com/mimuz/mimuz-ch55x:

Linting library in mimuz-ch55x
INFO: No header file found matching library name (mi_muz_for_ch55xduino.h). Best practices are for primary header       
      filename to match library name.                                                                                   
      See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format            
      (Rule LS008)                                                                                                      
WARNING: library.properties name value mi:muz for ch55xduino is longer than the recommended length of 16 characters.
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format     
         (Rule LP010)                                                                                               
ERROR: Prohibited character(s) in library.properties name value: mi:muz for ch55xduino                       
       See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
       (Rule LP011)                                                                                          
WARNING: library.properties name mi:muz for ch55xduino contains spaces. Although supported, best practices is to not use
         spaces.                                                                                                        
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format         
         (Rule LP015)                                                                                                   

Linter results for project: 1 ERRORS, 2 WARNINGS

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

Linting sketch in mimuz-ch55x/examples/midi-callback

Linter results for project: no errors or warnings

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

Linter results for projects: 1 ERRORS, 2 WARNINGS

[github-actions]

Thanks for your interest in contributing to the Arduino Library Manager index @tadfmac
Please resolve the error(s) mentioned in the previous comment.

After resolving the issue, trigger this check again by doing one of the following:

• Commit the required change to the branch you submitted this pull request from.
• Comment here, mentioning @ArduinoBot in the comment.

❗ NOTE: It is not necessary to open a new pull request. ❗

More information:
https://github.com/arduino/library-registry/blob/main/README.md#if-the-problem-is-with-the-pull-request

[tadfmac]

@ArduinoBot Thanks for your checking! I fixed it!

[github-actions]

Hello! I'm checking your submission again.

[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/mimuz/mimuz-ch55x/