fix: update python dependency rule (again) (#935)

See: renovatebot/renovate#35309

This should not open PRs anymore. Instead it should create an AI in the
dependency dashboard that can manually be triggered to update the python
version if we want to.

Author: SoWieMarkus

.github/renovate.json

@@ -134,14 +134,11 @@
       "matchDepTypes": ["tool-constraint"],
       "enabled": false
     },
-    {
-      "matchPackageNames": ["python"],
-      "allowedVersions": "3.13.x"
-    },
     {
       "matchManagers": ["github-actions"],
-      "matchPackageNames": ["actions/setup-python"],
-      "allowedVersions": "3.13.x"
+      "matchDepNames": ["python"],
+      "separateMultipleMinor": true,
+      "dependencyDashboardApproval": true
     },
     {
       "matchFileNames": [".github/actions/setup-claude-code-action/action.yml"],