Update repositories.txt

[HarutoHiroki]

Adding a library to support LGL Studio VFD Displays on Aliexpress

[github-actions]

❌ ERROR: Arduino Lint found errors with https://github.com/HarutoHiroki/VFDDisplay:

Linting library in VFDDisplay
ERROR: library.properties url value is less than minimum length.                                             
       See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
       (Rule LP056)                                                                                          
WARNING: library.properties url field value  does not have a valid URL format.                                 
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP041)                                                                                          
WARNING: Unable to load the library.properties url field: Head "": unsupported protocol scheme ""              
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP042)                                                                                          

Linter results for project: 1 ERRORS, 2 WARNINGS

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

Linting sketch in VFDDisplay/examples/BasicUsage

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 @HarutoHiroki
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