Bump actions versions and refine CI triggers

Upgrade GitHub Action usages in workflows: actions/checkout bumped to v6 and actions/setup-python to v6 in format.yml. Simplify testing-ci.yml triggers by replacing branch filters with pull_request types (opened, synchronize, reopened) and remove the explicit push/branches section. Also remove the Codecov token entry (relying on tokenless or other auth), and keep codecov action configuration intact. These changes modernize action versions and streamline CI trigger/auth configuration.

Author: C-Achard

.github/workflows/ci.yml

@@ -2,13 +2,7 @@ name: CI
 
 on:
   pull_request:
-    branches:
-      - main
-      - master
-  push:
-    branches:
-      - main
-      - master
+    types: [opened, synchronize, reopened]
 
 jobs:
   unit:
@@ -63,5 +57,4 @@ jobs:
         uses: codecov/codecov-action@v5
         with:
           files: ./coverage.xml
-          token: ${{ secrets.CODECOV_TOKEN }}
           fail_ci_if_error: true

.github/workflows/format.yml

@@ -12,7 +12,7 @@ jobs:
 
     steps:
       - name: Checkout full history
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
@@ -40,13 +40,13 @@ jobs:
 
     steps:
       - name: Checkout PR branch
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
           ref: ${{ github.head_ref }}
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.12"