chore: release v6.2.0

[RiccardoM]

Description

This PR prepares the code to release v6.2.0 of the software.

Closes: DCD-412

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Author Checklist

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please add links to any relevant follow up issues.

I have...

• included the correct type prefix in the PR title
• added ! to the type prefix if API or client breaking change
• targeted the correct branch (see PR Targeting)
• provided a link to the relevant issue or specification
• followed the guidelines for building modules
• included the necessary unit and integration tests
• added a changelog entry to CHANGELOG.md
• included comments for documenting Go code
• updated the relevant documentation or specification
• reviewed "Files changed" and left comments if necessary
• confirmed all CI checks have passed

Reviewers Checklist

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I have...

• confirmed the correct type prefix in the PR title
• confirmed ! in the type prefix if API or client breaking change
• confirmed all author checklist items have been addressed
• reviewed state machine logic
• reviewed API design and naming
• reviewed documentation is accurate
• reviewed tests and test coverage
• manually tested (if applicable)

[github-actions]

👀 Docs preview available here: https://652ef466c39d247e0f9185f9--desmos-docs.netlify.app

[codecov]

Codecov Report

All modified lines are covered by tests ✅

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

📢 Thoughts on this report? Let us know!.

[RiccardoM]

Apparentely, the on-chain upgrade test keeps failing here for some reason. I have tested it locally and it works without any issue. I'm attaching screenshots as a proof (the upgrade was planned for height 80). Merging this anyway.