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Alenka Frim authored and Krisztián Szűcs committed deb6e132da9
ARROW-15343: [Doc][Guide] Introduction and the checklist - minor corrections Add changes to `index.rst` of the New Contributors Guide. Closes #12186 from AlenkaF/ARROW-15343 Authored-by: Alenka Frim <frim.alenka@gmail.com> Signed-off-by: Krisztián Szűcs <szucs.krisztian@gmail.com>