Aligner .github/workflows/0-start-exercise.yml sur checkout v4

Author: lilblueyes

.github/workflows/0-start-exercise.yml

@@ -35,12 +35,12 @@ jobs:
 
     steps:
       - name: Récupérer le dépôt
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
         with:
           ref: main
 
       - name: Récupérer les templates français
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
         with:
           repository: ${{ env.TOOLKIT_REPOSITORY }}
           path: exercise-toolkit-fr