docs: fix 'sqllite' typo in sqllogictest README

[MsfPablo]

Which issue does this PR close?

N/A - trivial documentation fix.

Rationale for this change

datafusion/sqllogictest/README.md misspells "sqlite" as "sqllite" in the instructions for regenerating expected answers. The script it references is regenerate_sqlite_files.sh, so the surrounding prose should match.

What changes are included in this PR?

One-word spelling correction in datafusion/sqllogictest/README.md.

Are these changes tested?

No code changes; documentation only.

Are there any user-facing changes?

No.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.57%. Comparing base (a274959) to head (0c07640).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #24825      +/-   ##
==========================================
- Coverage   81.58%   81.57%   -0.01%     
==========================================
  Files        1123     1123              
  Lines      406610   406610              
  Branches   406610   406610              
==========================================
- Hits       331719   331712       -7     
- Misses      55453    55457       +4     
- Partials    19438    19441       +3     

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