fix: upgrade client router key

[fedekunze]

Description

Closes: #XXX

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PR review checkboxes:

I have...

• added a relevant changelog entry to the Unreleased section in CHANGELOG.md
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Code maintenance:

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• written unit and integration tests
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Reviewers Checklist

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I have...

• confirmed the correct type prefix in the PR title
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[codecov]

Codecov Report

Merging #537 (b3322fa) into main (af86618) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #537   +/-   ##
=======================================
  Coverage   81.56%   81.56%           
=======================================
  Files         115      115           
  Lines        6375     6375           
=======================================
  Hits         5200     5200           
  Misses       1018     1018           
  Partials      157      157           

Impacted Files	Coverage Δ
app/app.go	84.67% <100.00%> (ø)