Improve chenwy22.md: fix lint errors, apply pangu spacing, and format markdown

- Fix MD037: replace * 2 with × 2 for proper emphasis
- Fix MD034: wrap bare URLs in angle brackets
- Fix MD029: restart ordered list numbering
- Fix MD040: add language specifier to fenced code block
- Fix MD036: convert bold headings to proper h3 headings
- Fix MD012: reduce multiple consecutive blank lines
- Apply pangu-style spacing between Chinese and non-Chinese text
- Improve overall markdown formatting for readability

Author: sghng