chore: release v3.0.0

[RiccardoM]

Description

This PR prepares the CHANGELOG to release v3.0.0 of Desmos

Depends-On: #784
Depends-On: #785

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Author Checklist

All items are required. Please add a note to the item if the item is not applicable and
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

All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.

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)

[leobragaz]

why this since it's not implemented yet?

[leobragaz]

Suggested change

	- ([\#688](https://github.com/desmos-labs/desmos/pull/688)) add support for hex address in chain link
	- ([\#688](https://github.com/desmos-labs/desmos/pull/688)) Added support for hex address in chain link

[RiccardoM]

Closing this, will re-open later when the other PRs are merged