Update renovate configuration

[ManuelMoeri]

Is your feature request related to a problem? Please describe.
While doing a few dozen renovate pull request I took the time to update the renovate.json to improve grouping of a few pull requests. I also updated some outdated commands. The only one I was not able to update is the
matchPackagePrefixes

Describe the solution you'd like
matchPackagePrefixes should be replaced with matchPackageNames as suggested by renovate themselves.

WARN: Config needs migrating
       "configType": "renovate.json",
       "originalConfig": {
         "$schema": "https://docs.renovatebot.com/renovate-schema.json",
         "extends": ["config:recommended", ":rebaseStalePrs"],
         "schedule": ["* 1-5 * * 1-5"],
         "automergeSchedule": ["* 5-7 * * 1-5"],
         "automergeType": "pr",
         "timezone": "Europe/Zurich",
         "packageRules": [
           {
             "groupName": "All Angular packages",
             "matchPackageNames": ["^@angular", "^@angular-eslint"],
             "matchUpdateTypes": ["major", "minor", "patch"]
           },
           {
             "groupName": "All devDependencies (minor and patch)",
             "matchDepTypes": ["devDependencies"],
             "matchUpdateTypes": ["minor", "patch"],
             "automerge": true
           },
           {
             "groupName": "All ESLint packages",
             "matchPackageNames": ["eslint", "typescript-eslint"],
             "matchUpdateTypes": ["major", "minor", "patch"]
           },
           {
             "matchDatasources": ["maven"],
             "matchPackagePrefixes": ["ch.puzzle.okr"],
             "matchDepTypes": ["parent"],
             "enabled": false
           }
         ]
       },
       "migratedConfig": {
         "$schema": "https://docs.renovatebot.com/renovate-schema.json",
         "extends": ["config:recommended", ":rebaseStalePrs"],
         "schedule": ["* 1-5 * * 1-5"],
         "automergeSchedule": ["* 5-7 * * 1-5"],
         "automergeType": "pr",
         "timezone": "Europe/Zurich",
         "packageRules": [
           {
             "groupName": "All Angular packages",
             "matchPackageNames": ["^@angular", "^@angular-eslint"],
             "matchUpdateTypes": ["major", "minor", "patch"]
           },
           {
             "groupName": "All devDependencies (minor and patch)",
             "matchDepTypes": ["devDependencies"],
             "matchUpdateTypes": ["minor", "patch"],
             "automerge": true
           },
           {
             "groupName": "All ESLint packages",
             "matchPackageNames": ["eslint", "typescript-eslint"],
             "matchUpdateTypes": ["major", "minor", "patch"]
           },
           {
             "matchDatasources": ["maven"],
             "matchDepTypes": ["parent"],
             "enabled": false,
             "matchPackageNames": ["ch.puzzle.okr{/,}**"]
           }
         ]
       }

Additional context
To run local test runs of this I suggest looking at this post.

This error occured on the renovate repository after changing to matchPackageNames