chore: release v0.16.1

[github-actions]

🤖 New release

• prost-reflect: 0.16.0 -> 0.16.1 (✓ API compatible changes)

Changelog

prost-reflect

0.16.1 - 2025-08-01

Added

• Add OneofDescriptor::is_synthetic (#175)

Other

• Add default_value method to FieldDescriptor, ExtensionDescriptor and Value for better visibility (#176)

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This PR was generated with release-plz.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.79%. Comparing base (3526005) to head (34e7180).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #177      +/-   ##
==========================================
+ Coverage   79.68%   79.79%   +0.11%     
==========================================
  Files          31       31              
  Lines        5257     5257              
==========================================
+ Hits         4189     4195       +6     
+ Misses       1068     1062       -6     

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