🔧(renovate) ignore js dependencies bootstrap

Renovate service is trying to upgrade the version of bootstrap. Ashley is not
configured yet to properly work with version 5 of bootstrap. There are
different breaking styles that need to be fixed first. We still want
renovate to work for other dependencies, so we explicitly exclude
bootstrap from the config of renovate.

renovate.json

@@ -1,5 +1,15 @@
 {
   "extends": [
     "github>openfun/renovate-configuration"
+  ],
+  "packageRules": [
+    {
+      "enabled": false,
+      "groupName": "ignored js dependencies",
+      "matchManagers": ["npm"],
+      "matchPackageNames": [
+        "bootstrap"
+      ]
+    }
   ]
 }