[TASK] Run tests daily

<Description, wrap the lines after 100 characters manually>

Refs: #<issue number>

.github/workflows/ci.yml

@@ -8,6 +8,13 @@ on:
  pull_request:
  branches: [ main, release-13.0.x, release-12.0.x, release-11.6.x, release-11.5.x, task/*_compatibility ]
 
+ # Run tests daily at 19:23 to get TYPO3 changes and fix them immediately.
+ # @todo:
+ # * run only on dev-<TYPO3-LTS-branch/alias>
+ # * create issue on GH or message via TYPO3 Slack bot, if tests failed
+ schedule:
+ - cron: '23 19 * * *'
+
 env:
  IS_ON_GITHUB_ACTIONS: 'true'
  CI_BUILD_DIRECTORY: '/home/runner/work/ext-solr/ext-solr/.Build'