fix(Renovate): Add mergeConfidence:all-badges

Renovate added merge confidence presets in v36.8.0. Merge confidence
badges display the age of the new package version along with its
adoption among Renovate users, the percentage of Renovate repositories
on which the new version passes CI, and an overall confidence score for
the update. Merge confidence badges have been enabled automatically for
us, because we use Forking Renovate, but specify them explicitly for
consistency if self-hosting Renovate.

default.json

@@ -5,7 +5,8 @@
     "config:base",
     ":assignee(Kurt-von-Laven)",
     ":reviewer(team:dependency-management)",
-    "helpers:disableTypesNodeMajor"
+    "helpers:disableTypesNodeMajor",
+    "mergeConfidence:all-badges"
   ],
   "addLabels": ["dependencies"],
   "commitBodyTable": true,