Update module github.com/aws/smithy-go to v1.28.5

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
github.com/aws/smithy-go	v1.28.4 → v1.28.5

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Release Notes

aws/smithy-go (github.com/aws/smithy-go)

v1.28.5

Compare Source

General Highlights

• Dependency Update: Updated to the latest SDK module versions

Module Highlights

• github.com/aws/smithy-go: v1.28.5
  • Bug Fix: Retain the key with the zero value when encountering a null-value key in a dense map. This matches how legacy code-generated JSON deserializers behaved.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.87%. Comparing base (7d2bf33) to head (dd3cecb).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #14   +/-   ##
=======================================
  Coverage   95.87%   95.87%           
=======================================
  Files           5        5           
  Lines          97       97           
=======================================
  Hits           93       93           
  Misses          4        4           

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