Update repositories.txt

[Ebola-Chan-bot]

Add Arduino-STL-2. This library is based on the existing ArduinoSTL, whose author has no activities for quite a long time.

[github-actions]

❌ ERROR: Arduino Lint found errors with https://github.com/Silver-Fang/ArduinoSTL:

Linting library in ArduinoSTL
INFO: No header file found matching library name (Arduino-STL-2.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)                                                                                                      
ERROR: Library name Arduino-STL-2 starts with "Arduino". These names are reserved for official libraries.    
       See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
       (Rule LP012)                                                                                          
WARNING: No example sketches found. Please provide examples.                                      
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#library-examples
         (Rule LD004)                                                                             

Linter results for project: 1 ERRORS, 1 WARNINGS

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

[github-actions]

Thanks for your interest in contributing to the Arduino Library Manager index @silver-fang
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.

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

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

[Ebola-Chan-bot]

@ArduinoBot

[github-actions]

Hello! I'm checking your submission again.

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/Silver-Fang/ArduinoSTL:

Linting library in ArduinoSTL
INFO: No header file found matching library name (STL_for_Arduino.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 name STL for Arduino contains "Arduino". This is superfluous.                                 
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP014)                                                                                          
WARNING: library.properties name STL for Arduino 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)                                                                                                   

Linter results for project: 0 ERRORS, 2 WARNINGS

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

Linting sketch in ArduinoSTL/examples/CinAndCout

Linter results for project: no errors or warnings

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

Linter results for projects: 0 ERRORS, 2 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/Silver-Fang/ArduinoSTL/