TST: fix shebang typo (#21307)
TST: fix shebang typo (#21307)

Fix shebang typo in generate_legacy_storage_files.py

closes #21306
MJuddBooth/pandas,toobaz/pandas,jorisvandenbossche/pandas,amolkahat/pandas,MJuddBooth/pandas,cbertinato/pandas,dsm054/pandas,rs2/pandas,rs2/pandas,louispotok/pandas,harisbal/pandas,kdebrab/pandas,cython-testbed/pandas,pandas-dev/pandas,cbertinato/pandas,rs2/pandas,kdebrab/pandas,gfyoung/pandas,pandas-dev/pandas,jreback/pandas,jorisvandenbossche/pandas,GuessWhoSamFoo/pandas,MJuddBooth/pandas,pratapvardhan/pandas,jreback/pandas,rs2/pandas,datapythonista/pandas,MJuddBooth/pandas,dsm054/pandas,kdebrab/pandas,cbertinato/pandas,gfyoung/pandas,TomAugspurger/pandas,louispotok/pandas,dsm054/pandas,louispotok/pandas,cbertinato/pandas,jorisvandenbossche/pandas,pratapvardhan/pandas,cython-testbed/pandas,pratapvardhan/pandas,gfyoung/pandas,datapythonista/pandas,harisbal/pandas,louispotok/pandas,MJuddBooth/pandas,dsm054/pandas,amolkahat/pandas,cython-testbed/pandas,TomAugspurger/pandas,pratapvardhan/pandas,cbertinato/pandas,louispotok/pandas,harisbal/pandas,GuessWhoSamFoo/pandas,harisbal/pandas,toobaz/pandas,gfyoung/pandas,jreback/pandas,cython-testbed/pandas,datapythonista/pandas,jorisvandenbossche/pandas,amolkahat/pandas,GuessWhoSamFoo/pandas,amolkahat/pandas,datapythonista/pandas,toobaz/pandas,pratapvardhan/pandas,jreback/pandas,toobaz/pandas,kdebrab/pandas,GuessWhoSamFoo/pandas,dsm054/pandas,gfyoung/pandas,amolkahat/pandas,pandas-dev/pandas,GuessWhoSamFoo/pandas,TomAugspurger/pandas,cython-testbed/pandas,kdebrab/pandas,pandas-dev/pandas,jreback/pandas,TomAugspurger/pandas,toobaz/pandas,harisbal/pandas