Update GitHub Actions Node runtime pins

[mehul0810]

Summary

• Update JavaScript GitHub Actions to versions whose action metadata uses the Node 24 runtime.
• Cover checkout, setup-node, sticky PR comments, PR playground comments, and release asset upload workflows.
• Leave composite and Docker-based actions unchanged because they are not Node action-runtime warning sources.

Node 24 metadata verified

• actions/checkout@v7.0.0 -> using: node24
• actions/setup-node@v6.4.0 -> using: node24
• marocchino/sticky-pull-request-comment@v3.0.4 -> using: node24
• mshick/add-pr-comment@v3.12.0 -> using: node24
• softprops/action-gh-release@v3.0.1 -> using: node24
• Existing shivammathur/setup-php@v2 already reports using: node24

Validation

• Parsed all .github/workflows/*.yml files with Ruby YAML.
• git diff --check
• Confirmed no remaining actions/checkout@v4, actions/setup-node@v4, marocchino/sticky-pull-request-comment@v2, mshick/add-pr-comment@v2, or softprops/action-gh-release@v2 references.
• actionlint is not installed locally; hosted workflow execution is the final validation for action compatibility.

Closes #101

[github-actions]

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