Try to disable Python in github-actions (#13789)

Author: srittau

.github/renovate.json5

@@ -12,20 +12,14 @@
   },
   "packageRules": [
     {
-      "groupName": "GitHub Actions",
-      "matchManagers": ["github-actions"],
-      "description": "Quarterly update of GitHub Action dependencies",
-      "schedule": ["every 3 months on the first day of the month"]
-    },
-    {
+      groupName: "GitHub Actions",
+      matchManagers: ["github-actions"],
       // This package rule disables updates for `actions/setup-python` Python versions:
       // it's better to do these manually as there's often a reason why we can't use
       // the latest Python version in CI for a specific job
-      groupName: "Python versions",
-      matchManagers: ["github-actions"],
-      matchPackageNames: ["python"],
-      description: "Disable PRs updating Python versions",
-      enabled: false,
+      matchPackageNames: ["!python"],
+      description: "Quarterly update of GitHub Action dependencies",
+      schedule: ["every 3 months on the first day of the month"]
     },
     {
       groupName: "most test/lint dependencies",