Update Horus from 0.3.0 to 0.3.1

[dumbbell]

Release notes:
https://github.com/rabbitmq/horus/releases/tag/v0.3.1

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.61%. Comparing base (3aacfb5) to head (c2be1d3).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #307   +/-   ##
=======================================
  Coverage   89.61%   89.61%           
=======================================
  Files          22       22           
  Lines        3263     3263           
=======================================
  Hits         2924     2924           
  Misses        339      339           

Flag	Coverage Δ
erlang-25	88.63% <ø> (-0.19%)	⬇️
erlang-26	89.36% <ø> (+0.12%)	⬆️
erlang-27	89.54% <ø> (+0.24%)	⬆️
os-ubuntu-latest	89.39% <ø> (-0.19%)	⬇️
os-windows-latest	89.61% <ø> (+0.18%)	⬆️

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