Merge pull request 'Update renovate.json' (#22) from cswimr-automerge-digest into main

Reviewed-on: https://www.coastalcommits.com/cc/renovate-config/pulls/22

renovate.json

@@ -2,5 +2,11 @@
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
     "local>cc/renovate-config"
+  ],
+  "packageRules": [
+    {
+      "matchUpdateTypes": ["digest"],
+      "automerge": true
+    }
   ]
 }