fix(deps): update github.com/aws/aws-sdk-go-v2 (patch)

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/aws/aws-sdk-go-v2/config	require	patch	v1.18.20 -> v1.18.21
github.com/aws/aws-sdk-go-v2/credentials	require	patch	v1.13.19 -> v1.13.20
github.com/aws/aws-sdk-go-v2/service/iotsecuretunneling	require	patch	v1.15.7 -> v1.15.8

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[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (5dbc296) 63.19% compared to head (3dbf4db) 63.19%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #441   +/-   ##
=======================================
  Coverage   63.19%   63.19%           
=======================================
  Files          33       33           
  Lines        2228     2228           
=======================================
  Hits         1408     1408           
  Misses        724      724           
  Partials       96       96           

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