fix(VStepper): allow tooltips in title slots - #23230

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: fkirc/skip-duplicate-actions@04a1aebece824b56e6ad6a401d015479cd1c50b3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/