Update repositories.txt

[atesin]

added MinimalLinkedList library

[github-actions]

Arduino Lint has suggestions for possible improvements to https://gitlab.com/atesin/minimallinkedlist_arduino:

Linting library in minimallinkedlist_arduino
WARNING: library.properties name value MinimalLinkedList is longer than the recommended length of 16 characters.
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format 
         (Rule LP010)                                                                                           

Linter results for project: 0 ERRORS, 1 WARNINGS

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Linting sketch in minimallinkedlist_arduino/examples/linkedList_assoc

Linter results for project: no errors or warnings

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Linting sketch in minimallinkedlist_arduino/examples/linkedList_integers

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/gitlab.com/atesin/minimallinkedlist_arduino/