cp: Fix bug in SDG example (1370) into r1.1.0

[pablo-garay]

beep boop [🤖]: Hi @sarahyurick 👋,

we've cherry picked #1370 into  for you! 🚀

Please review and approve this cherry pick by your convenience!

[pablo-garay]

/ok to test b0dea54

[copy-pr-bot]

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[greptile-apps]

Greptile Summary

This PR cherry-picks a bug fix from #1370 into the r1.1.0 release branch. The fix corrects a single-line issue in the BeginsWithLanguageFilter class constructor.

• Changed self.name to self._name in BeginsWithLanguageFilter.__init__() (line 54)
• Aligns with DocumentFilter base class pattern, which uses _name as the internal attribute and exposes it via a name property
• Matches the pattern used in other filter implementations (e.g., LetterCountFilter in test files)
• This is a straightforward cherry-pick with no conflicts or additional changes

Confidence Score: 5/5

• This PR is safe to merge with no risk
• This is a clean cherry-pick of a straightforward bug fix that corrects an attribute naming issue to match the base class pattern. The change is minimal (one line), syntactically correct, and follows established conventions in the codebase.
• No files require special attention

Important Files Changed

Filename	Overview
tutorials/synthetic/synthetic_data_generation_example.py	Fixed attribute name from self.name to self._name to properly override the base class's internal name attribute

Sequence Diagram

sequenceDiagram
    participant User
    participant BeginsWithLanguageFilter
    participant DocumentFilter
    participant ScoreFilter

    User->>BeginsWithLanguageFilter: __init__(languages)
    BeginsWithLanguageFilter->>BeginsWithLanguageFilter: Set self._name = "begins_with_language_filter"
    Note over BeginsWithLanguageFilter: Fixed: Changed from self.name to self._name
    BeginsWithLanguageFilter->>BeginsWithLanguageFilter: Set self.languages
    
    User->>ScoreFilter: Create with BeginsWithLanguageFilter
    ScoreFilter->>BeginsWithLanguageFilter: score_document(text)
    BeginsWithLanguageFilter-->>ScoreFilter: Return score (1.0 or 0.0)
    ScoreFilter->>BeginsWithLanguageFilter: keep_document(score)
    BeginsWithLanguageFilter-->>ScoreFilter: Return boolean
    
    User->>DocumentFilter: Access name property
    DocumentFilter-->>User: Return self._name value

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