ci: enable updating ref. caches

[Borda]

What does this PR do?

allowing us to rebuild/update cache with reference metrics

Before submitting

• Was this discussed/agreed via a Github issue? (no need for typos and docs improvements)
• Did you read the contributor guideline, Pull Request section?
• Did you make sure to update the docs?
• Did you write any new necessary tests?

PR review

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📚 Documentation preview 📚: https://torchmetrics--2455.org.readthedocs.build/en/2455/

[codecov]

Codecov Report

Merging #2455 (b70b2b9) into master (905252b) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@          Coverage Diff           @@
##           master   #2455   +/-   ##
======================================
  Coverage      69%     69%           
======================================
  Files         307     307           
  Lines       17357   17357           
======================================
  Hits        11957   11957           
  Misses       5400    5400