chore(deps): update actions/setup-node action to v4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
actions/setup-node	action	major	v3 -> v4

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Release Notes

actions/setup-node (actions/setup-node)

v4

Compare Source

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Configuration

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PR-Codex overview

This PR updates the setup-node action to version 4 and installs the code-review-gpt package.

Detailed summary

• Updated the setup-node action from v3 to v4.
• Changed the node version to 18.
• Added the code-review-gpt package installation step.

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[yegor256]

@rultor please, try to merge, since 10 checks have passed

[rultor]

@rultor please, try to merge, since 10 checks have passed

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor please, try to merge, since 10 checks have passed

@yegor256 Done! FYI, the full log is here (took me 20min)