Disable semantic PR titles & grouped updates (#5027)

We don't want PR titles with semantic groups at the beginning, eg:

* `fix(deps): update dependency pytest-cov to v7.1.0`

Also, I don't like grouped updates, so that is disabled as well by
setting the group name to `null`.

Author: jtraglia

renovate.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "dependencyDashboard": false,
-  "extends": ["config:recommended"],
+  "extends": ["config:recommended", ":semanticCommitsDisabled"],
   "labels": ["dependencies"],
   "schedule": ["before 12pm on monday"],
   "packageRules": [
@@ -11,11 +11,11 @@
     },
     {
       "matchManagers": ["uv"],
-      "groupName": "python dependencies"
+      "groupName": null
     },
     {
       "matchManagers": ["github-actions"],
-      "groupName": "github actions"
+      "groupName": null
     }
   ]
 }