docs: simplify production release instructions to use github ui

[yiyche]

Simplify production release section to combine git tagging and release creation into a single GitHub UI action.

[gemini-code-assist]

Code Review

This pull request updates the production release documentation in docs/release.md to guide users through publishing a release via the GitHub UI instead of manually pushing git tags. The feedback suggests improving the step-by-step instructions by recommending that the release title match the version tag and utilizing GitHub's 'Generate release notes' feature to automatically populate the description.

Important

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[gemini-code-assist]

To make the release process more efficient and consistent, it is recommended to specify that the release title should match the version tag, and to suggest using GitHub's Generate release notes button to automatically populate the release description.

Suggested change

	3. Set target to `main`, add a title/description, and click **Publish release**.
	3. Set target to "main", set the Release title to your version tag (e.g., "v1.2.3"), click Generate release notes to automatically populate the description, and click Publish release.