Update repositories.txt

[pervu]

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[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/pervu/FIFObuf:

Linting library in FIFObuf
WARNING: library.properties version value 1.0 is not compliant with the semver specification.
         See: https://semver.org/                                                            
         (Rule LP021)                                                                        
WARNING: Sketch(es) found outside examples and extras folders:                                    
           FIFObuf/Examples/FIFObuf                                                               
           FIFObuf/Examples/LIFObuf                                                               
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#library-examples
         (Rule LD003)                                                                             
WARNING: No example sketches found. Please provide examples.                                      
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#library-examples
         (Rule LD004)                                                                             
WARNING: Potentially misspelled examples folder name found: FIFObuf/Examples                      
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#library-examples
         (Rule LD005)                                                                             
WARNING: Incorrect examples folder name case: FIFObuf/Examples                                    
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#library-examples
         (Rule LD006)                                                                             

Linter results for project: 0 ERRORS, 5 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/pervu/FIFObuf/