chore: upgrade codecov-action to v7.0.0 to fix GPG verification

[rax7389]

Summary

Upgrades codecov-action from v5.5.2 to v7.0.0 to fix GPG signature verification failure.

Why

The Codecov action v5.5.2 fails with GPG signature verification error because Codecov rotated their signing keys. The old action doesn't have the new public key in its keyring.

Error seen in CI:

gpg: Can't check signature: No public key
==> Could not verify signature. Please contact Codecov if problem continues

What

Updated codecov/codecov-action SHA from 671740ac38dd9b0130fbe1cec585b89eea48d3de (v5.5.2) to e53489f4d376d79066609109e7a95a29eb3740b1 (v7.0.0)

Packages

• packages/core
• packages/react
• examples

Testing

• CI workflow will validate the fix by successfully uploading coverage

Checklist

• Breaking change
• Requires docs update
• Backward compatible

Contributing

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 Code of Conduct

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.75%. Comparing base (5caf557) to head (ece8ff6).

Additional details and impacted files

@@           Coverage Diff            @@
##             main     #334    +/-   ##
========================================
  Coverage   89.75%   89.75%            
========================================
  Files         162      162            
  Lines       13542    13542            
  Branches     1881     1399   -482     
========================================
  Hits        12155    12155            
  Misses       1387     1387            

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.