Generator: Update SDK /services/valkey - #10252

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Failed to save: Unable to reserve cache with key setup-uv-2-x86_64-unknown-linux-gnu-ubuntu-24.04-3.12-pruned-174524ad56183c49261210b03c125ba05252775657d551b7c8e0eb19698968cf, another job may be creating this cache.