Update plugin io.ktor.plugin to v3.1.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
io.ktor.plugin	3.1.1 -> 3.1.2

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Configuration

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.55%. Comparing base (2470ae7) to head (98e7a73).
Report is 29 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #415   +/-   ##
=======================================
  Coverage   94.55%   94.55%           
=======================================
  Files          10       10           
  Lines         624      624           
  Branches      150      150           
=======================================
  Hits          590      590           
  Misses          7        7           
  Partials       27       27           

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