## Description
<!-- Add a description of the changes that this PR introduces and the files that
are the most critical to review. -->
This pull request adds a chain upgrade guide and example for v0.43. This pull request also removes migration documentation specific to v0.42 and adds links to v0.42 documentation when referencing genesis migrations.
---
### 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 `docs:` prefix in the PR title
- [x] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [x] provided a link to the relevant issue or specification - n/a
- [x] followed the [documentation writing guidelines](https://github.com/cosmos/cosmos-sdk/blob/master/docs/DOC_WRITING_GUIDELINES.md)
- [x] reviewed "Files changed" and left comments if necessary
- [x] 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...
- [x] confirmed the correct `docs:` prefix in the PR title
- [x] confirmed all author checklist items have been addressed
- [ ] confirmed that this PR only changes documentation
- [ ] reviewed content for consistency
- [ ] reviewed content for thoroughness
- [ ] reviewed content for spelling and grammar
- [ ] tested instructions (if applicable)
## Description
Closes: #9503
<!-- Add a description of the changes that this PR introduces and the files that
are the most critical to review. -->
Add documentation for setting StoreLoader as part of in-place store migration.
---
### 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 `docs:` prefix in the PR title
- [x] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [x] provided a link to the relevant issue or specification
- [ ] followed the [documentation writing guidelines](https://github.com/cosmos/cosmos-sdk/blob/master/docs/DOC_WRITING_GUIDELINES.md)
- [ ] 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...
- [x] confirmed the correct `docs:` prefix in the PR title
- [ ] confirmed all author checklist items have been addressed
- [x] confirmed that this PR only changes documentation
- [x] reviewed content for consistency
- [x] reviewed content for thoroughness
- [x] reviewed content for spelling and grammar
- [ ] tested instructions (if applicable)
Ryan Christoffersen
likhita-809
Ryan Christoffersen
technicallyty