Merge branch 'renovate/configure' into 'V2.0'

Configure Renovate

See merge request web-et-numerique/pamn_plateforme-des-acteurs-de-la-mediation-numerique/pamn_server!151

renovate.json

+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "local>systemes-dinformation/renovate/renovate-config"
+  ]
+}