chore: fix dead links (#3293)

## Description



closes: #XXXX


### Commit Message / Changelog Entry

```bash
type: commit message
```

see the [guidelines](https://github.com/cosmos/ibc-go/blob/main/docs/dev/pull-requests.md#commit-messages) for commit messages. (view raw markdown for examples)




---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

- [x] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/ibc-go/blob/main/docs/dev/pull-requests.md#pull-request-targeting)).
- [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/main/docs/docs/building-modules/10-structure.md) and [Go style guide](../docs/dev/go-style-guide.md).
- [ ] Wrote unit and integration [tests](https://github.com/cosmos/ibc-go/blob/main/testing/README.md#ibc-testing-package).
- [ ] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`).
- [ ] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [ ] Provide a [commit message](https://github.com/cosmos/ibc-go/blob/main/docs/dev/pull-requests.md#commit-messages) to be used for the changelog entry in the PR description for review.
- [x] Re-reviewed `Files changed` in the Github PR explorer.
- [ ] Review `Codecov Report` in the comment section below once CI passes.

.github/PULL_REQUEST_TEMPLATE.md

@@ -43,7 +43,7 @@ write a little note why.
 
 - [ ] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/ibc-go/blob/main/docs/dev/pull-requests.md#pull-request-targeting)).
 - [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
-- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/main/docs/docs/building-modules/10-structure.md) and [Go style guide](../docs/dev/go-style-guide.md).
+- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/main/docs/docs/building-modules/11-structure.md) and [Go style guide](../docs/dev/go-style-guide.md).
 - [ ] Wrote unit and integration [tests](https://github.com/cosmos/ibc-go/blob/main/testing/README.md#ibc-testing-package).
 - [ ] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`).
 - [ ] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).

docs/dev/project-structure.md

@@ -1,6 +1,6 @@
 # Project structure
 
-If you're not familiar with the overall module structure from the SDK modules, please check this [document](https://github.com/cosmos/cosmos-sdk/blob/main/docs/docs/building-modules/10-structure.md) as prerequisite reading.
+If you're not familiar with the overall module structure from the SDK modules, please check this [document](https://github.com/cosmos/cosmos-sdk/blob/main/docs/docs/building-modules/11-structure.md) as prerequisite reading.
 
 Every Interchain Standard (ICS) has been developed in its own package. The development team separated the IBC TAO (Transport, Authentication, Ordering) ICS specifications from the IBC application level specification. The following sections describe the architecture of the most relevant directories that comprise this repository.
 

docs/ibc/integration.md

@@ -157,7 +157,7 @@ func NewApp(...args) *App {
 
 ### Module Managers
 
-In order to use IBC, we need to add the new modules to the module `Manager` and to the `SimulationManager` in case your application supports [simulations](https://github.com/cosmos/cosmos-sdk/blob/main/docs/docs/building-modules/13-simulator.md).
+In order to use IBC, we need to add the new modules to the module `Manager` and to the `SimulationManager` in case your application supports [simulations](https://github.com/cosmos/cosmos-sdk/blob/main/docs/docs/building-modules/14-simulator.md).
 
 ```go
 // app.go