[CI] Allow build for python build scripts

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>

Author: fpistm

.github/workflows/Continuous-Integration.yml

@@ -8,13 +8,17 @@ on:
       - '**.md'
       - keywords.txt
       - CI/**
+      - '!CI/build/arduino-cli.py'
+      - '!CI/build/platformio-builder.py'
       - tools/**
   pull_request:
     paths-ignore:
       - '*.json'
       - '**.md'
       - keywords.txt
       - CI/**
+      - '!CI/build/arduino-cli.py'
+      - '!CI/build/platformio-builder.py'
       - tools/**
 jobs:
   astyle_check: