refactor: trigger CI when specific files change

.github/workflows/ci.yaml

@@ -4,9 +4,16 @@ on:
   push:
     branches:
       - "main"
+    paths:
+      - "chatbot/**"
+      - "tests/**"
+      - ".github/workflows/**"
   pull_request:
     types: [opened, reopened, synchronize, ready_for_review]
-
+    paths:
+      - "chatbot/**"
+      - "tests/**"
+      - ".github/workflows/**"
 
 jobs:
   test:

README.md

@@ -1,6 +1,6 @@
 # RAG (Retrieval-augmented generation) ChatBot
 [![CI](https://github.com/umbertogriffo/rag-chatbot/workflows/CI/badge.svg)](https://github.com/umbertogriffo/rag-chatbot/actions/workflows/ci.yaml)
-[![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
+[![Code style: Ruff](https://img.shields.io/endpoint?url=https://raw.githubusercontent.com/astral-sh/ruff/main/assets/badge/v2.json)](https://github.com/astral-sh/ruff)
 
 > [!IMPORTANT]
 > Disclaimer: The code has been tested on `Ubuntu 22.04.2 LTS` running on a Lenovo Legion 5 Pro