Update repositories.txt - avr-iot-cellular

[M68426]

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[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/microchip-pic-avr-solutions/avr-iot-cellular-arduino-library:

Linting library in avr-iot-cellular-arduino-library
INFO: No header file found matching library name (avr-iot-cellular.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 depends field item(s) DxCore 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, 1 WARNINGS

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Linting sketch in avr-iot-cellular-arduino-library/examples/debug_modem

Linter results for project: no errors or warnings

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Linting sketch in avr-iot-cellular-arduino-library/examples/extract_certificates

Linter results for project: no errors or warnings

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Linting sketch in avr-iot-cellular-arduino-library/examples/http

Linter results for project: no errors or warnings

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Linting sketch in avr-iot-cellular-arduino-library/examples/http_get_time

Linter results for project: no errors or warnings

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Linting sketch in avr-iot-cellular-arduino-library/examples/https

Linter results for project: no errors or warnings

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Linting sketch in avr-iot-cellular-arduino-library/examples/https_configure_ca

Linter results for project: no errors or warnings

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Linting sketch in avr-iot-cellular-arduino-library/examples/mqtt_polling

Linter results for project: no errors or warnings

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Linting sketch in avr-iot-cellular-arduino-library/examples/mqtt_polling_aws

Linter results for project: no errors or warnings

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Linting sketch in avr-iot-cellular-arduino-library/examples/power_down

Linter results for project: no errors or warnings

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Linting sketch in avr-iot-cellular-arduino-library/examples/power_save

Linter results for project: no errors or warnings

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Linting sketch in avr-iot-cellular-arduino-library/examples/sandbox

Linter results for project: no errors or warnings

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Linter results for projects: 0 ERRORS, 1 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/microchip-pic-avr-solutions/avr-iot-cellular-arduino-library/