Update repositories.txt

[ladyada]

add https://github.com/adafruit/Adafruit_Debounce

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/adafruit/Adafruit_Debounce:

Linting library in Adafruit_Debounce
WARNING: library.properties name value Adafruit Debounce is longer than the recommended length of 16 characters.
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format 
         (Rule LP010)                                                                                           
WARNING: library.properties name Adafruit Debounce 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)                                                                                                   
WARNING: The library.properties paragraph field repeats the sentence field. These are displayed together so redundancy  
         is not needed.                                                                                                 
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format         
         (Rule LP036)                                                                                                   
WARNING: Invalid category field value Input in library.properties                                              
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP038)                                                                                          

Linter results for project: 0 ERRORS, 4 WARNINGS

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

Linting sketch in Adafruit_Debounce/examples/simpletest

Linter results for project: no errors or warnings

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

Linter results for projects: 0 ERRORS, 4 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/adafruit/Adafruit_Debounce/