feat!: x/gov: raise max description length to 10k chars (backport cos…

…mos#10740) (cosmos#10921)

* feat!: x/gov: raise max description length to 10k chars (cosmos#10740)

The 5k character limit for governance proposals is something I've ran into several times now. This feels like an artificial constraint. The deposit is our mechanism to combat spam, and extra state used for this is really not a problem.

In this PR I propose raising this limit to 10k characters, to remove much of the immediate need for working around this 5k limit.

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## Description

Closes: #XXXX

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are the most critical to review. -->

---

### 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...

- [x] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [x] added `!` to the type prefix if API or client breaking change
- [x] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [ ] provided a link to the relevant issue or specification
- [x] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules)
- [x] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [x] added a changelog entry to `CHANGELOG.md`
- [x] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [x] updated the relevant documentation or specification
- [x] 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](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) 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)

(cherry picked from commit ea2bcc8)

# Conflicts:
#	CHANGELOG.md

* Update CHANGELOG.md

* Update CHANGELOG.md

Co-authored-by: Dev Ojha <ValarDragon@users.noreply.github.com>
Co-authored-by: Robert Zaremba <robert@zaremba.ch>

CHANGELOG.md

@@ -43,6 +43,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (auth) [\#10536](https://github.com/cosmos/cosmos-sdk/pull/10536]) Enable `SetSequence` for `ModuleAccount`.
 * (store) [#10218](https://github.com/cosmos/cosmos-sdk/pull/10218) Charge gas even when there are no entries while seeking.
 * (store) [#10247](https://github.com/cosmos/cosmos-sdk/pull/10247) Charge gas for the key length in gas meter.
+* (x/gov) [\#10740](https://github.com/cosmos/cosmos-sdk/pull/10740) Increase maximum proposal description size from 5k characters to 10k characters.
 
 ### API Breaking Changes
 

x/gov/types/content.go

@@ -9,7 +9,7 @@ import (
 
 // Constants pertaining to a Content object
 const (
-	MaxDescriptionLength int = 5000
+	MaxDescriptionLength int = 10000
 	MaxTitleLength       int = 140
 )