fix: update fetch-depth for template checkout to ensure full history

Author: samuel.robillard

.github/workflows/github-template-update-downstream.yml

@@ -105,7 +105,7 @@ jobs:
       - name: Checkout Template
         uses: actions/checkout@v5
         with:
-          fetch-depth: 1
+          fetch-depth: 0
           path: template
 
       - name: Checkout Downstream