🔧(renovate) use the suitenumerique/ci default preset

Replace the numerique-gouv/renovate-configuration preset with
github>suitenumerique/ci//renovate/default.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017ZTuvFw5C5t3xxzCmb3cEp

Author: 2 people

renovate.json

@@ -1,5 +1,5 @@
 {
-  "extends": ["github>numerique-gouv/renovate-configuration"],
+  "extends": ["github>suitenumerique/ci//renovate/default"],
   "dependencyDashboard": true,
   "labels": ["dependencies", "noChangeLog", "automated"],
   "schedule": ["before 7am on monday"],