Update npm to latest for OIDC support

[developerkunal]

Changes

Updated npm to the latest version in the npm-publish GitHub action to ensure full OIDC (OpenID Connect) authentication support for npm publishing.

• Added npm update step in to install latest npm version
• Ensures compatibility with npm's OIDC authentication feature

References

• npm is deprecating authentication tokens in favor of OIDC
• Latest npm versions have improved OIDC support and bug fixes

Testing

• This change adds unit test coverage - N/A (infrastructure change)
• This change adds integration test coverage - N/A (infrastructure change)

This will be tested during the next release workflow execution.

Checklist

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 Code of Conduct
• All existing and new tests complete without errors

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.20%. Comparing base (f3c024f) to head (5a1a559).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1257   +/-   ##
=======================================
  Coverage   78.20%   78.20%           
=======================================
  Files         356      356           
  Lines       17746    17746           
  Branches     9555     9555           
=======================================
  Hits        13878    13878           
  Misses       3868     3868           

Flag	Coverage Δ
alltests	78.20% <ø> (ø)

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