chore(release): aws-lambda-java-runtime-interface-client 2.12.0

[github-actions]

Post-release version bump for aws-lambda-java-runtime-interface-client 2.12.0 (already on Maven Central, tag aws-lambda-java-runtime-interface-client-2.12.0 pushed).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.79%. Comparing base (c8435cf) to head (360b7cb).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #644   +/-   ##
=========================================
  Coverage     65.79%   65.79%           
  Complexity      214      214           
=========================================
  Files            34       34           
  Lines           991      991           
  Branches        143      143           
=========================================
  Hits            652      652           
  Misses          287      287           
  Partials         52       52           

Flag	Coverage Δ
aarch64	65.79% <ø> (ø)
x86_64	65.38% <ø> (ø)

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