Add new repository URL to repositories.txt

[gustavofisica]

Repository: https://github.com/gustavofisica/PulseHeartLab
Maintainer: @gustavofisica
License: MIT; Category: Sensors
Tag: 0.1.1 (matches library.properties)
Structure: src/, examples/, keywords.txt, no submodules/binaries
Purpose: Beginner-friendly PPG processing for Arduino Uno

[Copilot]

Copilot wasn't able to review any files in this pull request.

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[github-actions]

Arduino Lint has suggestions for possible improvements to https://github.com/gustavofisica/PulseHeartLab:

Linting library in PulseHeartLab
WARNING: Unable to load the library.properties url field: 404 Not Found                                        
         See: https://arduino.github.io/arduino-cli/latest/library-specification/#libraryproperties-file-format
         (Rule LP042)                                                                                          

Linter results for project: 0 ERRORS, 1 WARNINGS

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

Linting sketch in PulseHeartLab/examples/BPMSerial

Linter results for project: no errors or warnings

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

Linting sketch in PulseHeartLab/examples/Basic

Linter results for project: no errors or warnings

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

Linting sketch in PulseHeartLab/examples/BasicPlot

Linter results for project: no errors or warnings

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

Linting sketch in PulseHeartLab/examples/Calibrate

Linter results for project: no errors or warnings

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

Linting sketch in PulseHeartLab/examples/NotchDemo

Linter results for project: no errors or warnings

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

Linting sketch in PulseHeartLab/examples/PhysioZooExport

Linter results for project: no errors or warnings

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

Linting sketch in PulseHeartLab/examples/QualityDemo

Linter results for project: no errors or warnings

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

Linting sketch in PulseHeartLab/examples/TemplateDemo

Linter results for project: no errors or warnings

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

Linting sketch in PulseHeartLab/examples/TestSignal

Linter results for project: no errors or warnings

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

Linting sketch in PulseHeartLab/examples/ThresholdTuning

Linter results for project: no errors or warnings

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

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/gustavofisica/PulseHeartLab/