CI: Upgrade actions/github-script from v7 to v9 (Node 20 deprecated)

[ctron]

Summary

The actions/github-script@v7 action targets Node.js 20, which is deprecated by GitHub Actions. CI logs show:

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/github-script@v7.

Reference: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Affected files

• .github/workflows/build-binary.yaml (2 uses — Windows build steps)
• .github/workflows/rita-request-review.yaml (2 uses)

Fix

Upgrade from actions/github-script@v7 to actions/github-script@v9.

[ctron]

Jira: TC-5165