Summary: 데이터리안 reduces bootcamp early bird discount days

Why It Matters: This change shows a shorter window for early bird pricing on their bootcamps.

What Changed:

• The "SQL 데이터 분석 캠프 | 입문+실전" early bird discount changed from "D-9" to "D-4".
• The "SQL 데이터 분석 캠프 | 마스터반" early bird discount changed from "D-9" to "D-4".
• The "GA4 데이터 분석 캠프" early bird discount changed from "D-9" to "D-4".
• The "블로그 인기글" section content was updated.
• The "블로그 추천글" section content was updated.