Update repositories.txt to add an RFID module library

[HeroLink6]

added an RFID module library for the RFID module, making it easier to use the module when coding whatever you are making.

[github-actions[bot]]

A problem was found with your submission https://github.com/HeroLink6/Arduino-RFID-Library

:x: ERROR: The repository has no tags. You need to create a release or tag that matches the version value in the library's library.properties file.

[github-actions[bot]]

Thanks for your interest in contributing to the Arduino Library Manager index @HeroLink6 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.

:exclamation: NOTE: It is not necessary to open a new pull request. :exclamation:

More information: https://github.com/arduino/library-registry/blob/main/README.md#if-the-problem-is-with-the-pull-request

[HeroLink6]

I fixed it @ArduinoBot

[github-actions[bot]]

Hello! I'm checking your submission again.

[github-actions[bot]]

A problem was found with your submission https://github.com/HeroLink6/Arduino-RFID-Library

:x: ERROR: Library is missing a library.properties metadata file.

See: https://arduino.github.io/arduino-cli/latest/library-specification/#library-metadata

[github-actions[bot]]

Thanks for your interest in contributing to the Arduino Library Manager index @HeroLink6 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.

:exclamation: NOTE: It is not necessary to open a new pull request. :exclamation:

More information: https://github.com/arduino/library-registry/blob/main/README.md#if-the-problem-is-with-the-pull-request