chore: release v2.3.0-testnet

[RiccardoM]

Description

This PR prepares the release for the v2.3.0-testnet version of Desmos, which fixes how the application link verification flow is handled in order to avoid any error due to parallel verification requests or deleted links.

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

Codecov Report

Merging #672 (b7f05dd) into master (9da9567) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master     #672   +/-   ##
=======================================
  Coverage   15.78%   15.78%           
=======================================
  Files         169      169           
  Lines       46009    46009           
=======================================
  Hits         7263     7263           
  Misses      38119    38119           
  Partials      627      627           

Impacted Files	Coverage Δ
app/app.go	82.43% <0.00%> (ø)

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[dadamu]

Everything looks good to me.

[leobragaz]

👍 Ready to go