fix: fix Parquet dataset push to Hub

[raphael0202]

A return statement was missing, and Parquet file was pushed in staging as well

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 54.42%. Comparing base (8b457f8) to head (9796cf6).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
robotoff/scheduler/__init__.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1458      +/-   ##
==========================================
- Coverage   54.43%   54.42%   -0.01%     
==========================================
  Files          85       85              
  Lines        8673     8674       +1     
==========================================
  Hits         4721     4721              
- Misses       3952     3953       +1     

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