Auto-update DiscordSC to version 1.2.0 (commit 508a4dd1196c0acaa94d3e… - #250

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v3. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/