docs: recommend job summary reports

[jasonsaayman]

Summary

• Removes README guidance for posting bundle-size reports as PR comments.
• Documents appending bundle-size-comparison.md to $GITHUB_STEP_SUMMARY as the safe way to surface reports from pull-request-controlled code.

Testing

Docs-only change; tests and build were not run.

• pnpm test
• pnpm run build

Checklist

• I updated tests or explained why no test changes are needed.
• I updated documentation when behavior, inputs, outputs, or workflow usage changed.
• I updated dist/index.js when runtime source, dependencies, or action metadata changed.
• I kept JSON report behavior machine-readable and backward-compatible unless intentionally changed.

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Summary by cubic

Recommend surfacing bundle-size reports via GitHub Actions job summaries instead of PR comments. This removes risky/complex comment workflows and shows the safe way to display reports from PR code.

• Migration
  • In your pull_request workflow that runs axios/bundle-size@main, append bundle-size-comparison.md to $GITHUB_STEP_SUMMARY (e.g., cat bundle-size-comparison.md >> "$GITHUB_STEP_SUMMARY"). Remove any PR comment steps or workflow_run comment workflows.

^{Written for commit cdf2f0b. Summary will update on new commits. Review in cubic}

[cubic-dev-ai]

No issues found across 1 file

_{Re-trigger cubic}