README links to non-existent CODE_OF_CONDUCT.md and developer_setup.md (404)

[ethanlin01x]

The "Contributing" section of the README contains two broken links that 404 for anyone trying to get started as a contributor.

Current behavior

Links to two files that do not exist on main:

1. Code of Conduct → https://github.com/apache/burr/blob/main/CODE_OF_CONDUCT.md — this file was removed in remove DAGWorks code of conduct #545 (remove DAGWorks code of conduct) as part of the ASF migration, but the README link was never updated.
2. Developer setup guide → https://github.com/apache/burr/blob/main/developer_setup.md — the developer setup docs live under docs/contributing/setup.rst.

Both links return HTTP 404.

Stack Traces

1. Open the README on GitHub and scroll to the "Contributing" section (line 260).
2. Click the "Code of Conduct" link → 404.
3. Click the "developer setup guide" link → 404.

Screenshots

(If applicable)

Steps to replicate behavior

1. Open the README on GitHub and scroll to the "Contributing" section (line 260).
2. Click the "Code of Conduct" link → 404.
3. Click the "developer setup guide" link → 404.

Library & System Information

E.g. python version, burr library version, linux, etc.

Expected behavior

• Code of Conduct should point to the ASF Code of Conduct, consistent with the rest of the project: either https://www.apache.org/foundation/policies/conduct.html (as used in docs/asf/index.rst) or https://github.com/apache/burr?tab=coc-ov-file#readme (as used in CONTRIBUTING.rst).
• Developer setup guide should point to the existing setup docs, e.g. https://github.com/apache/burr/blob/main/docs/contributing/setup.rst.

Additional context

Add any other context about the problem here.

[ethanlin01x]

opened a PR with the fix #838