[BE] Improve Haiku prompt

[ottlseo]

Haiku has more issues than Sonnet like below.

1. Including the answer of System: prompt, not only Human: prompt

2. Returning multiple answers

3. Showing duplicated vocabulary at one sentence (both <corrected> and <better> tag)

Corrected by Haiku:  We're <corrected>usually</corrected> <better>often</better> watching the YouTube videos <corrected>frequently</corrected>. It <corrected>has been</corrected> <better>has been shown</better> that the <corrected>helping this</corrected> <better>help this provides</better> is to our daily routines because the video content can provide us with <corrected>many learnings</corrected> <better>much learning</better> and entertainment that we <corrected>couldn't</corrected> <better>may not</better> experience on our own.

[ottlseo]

Haiku 3.0 vs Sonnet 3.5

Haiku 3.0에 아무리 적절한 프롬프트를 추가해도 Sonnet 3.5 성능이 훨씬 좋음