chore: fix broken links (backport #2511) (#2520)

* fix broken links (#2511)

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>
(cherry picked from commit 4c45212)

# Conflicts:
#	docs/ibc/apps/apps.md
#	docs/middleware/ics29-fee/fee-distribution.md
#	modules/apps/transfer/spec/06_metrics.md

* Delete apps.md

* Delete fee-distribution.md

* fix conflict

Co-authored-by: Carlos Rodriguez <carlos@interchain.io>

.github/PULL_REQUEST_TEMPLATE.md

@@ -20,7 +20,7 @@ write a little note why.
 
 - [ ] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/ibc-go/blob/master/CONTRIBUTING.md#pr-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/master/docs/building-modules/structure.md).
+- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/main/docs/docs/building-modules/10-structure.md).
 - [ ] Wrote unit and integration [tests](https://github.com/cosmos/ibc-go/blob/master/CONTRIBUTING.md#testing)
 - [ ] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
 - [ ] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).

docs/DOCS_README.md

@@ -96,7 +96,7 @@ We are using [Algolia](https://www.algolia.com) to power full-text search. This
 ## Consistency
 
 Because the build processes are identical (as is the information contained herein), this file should be kept in sync as
-much as possible with its [counterpart in the Cosmos SDK repo](https://github.com/cosmos/cosmos-sdk/tree/master/docs/DOCS_README.md).
+much as possible with its [counterpart in the Cosmos SDK repo](https://github.com/cosmos/cosmos-sdk/blob/main/docs/README.md).
 
 ### Update and Build the RPC docs
 

docs/ibc/apps.md

@@ -474,4 +474,4 @@ callbacks](https://github.com/cosmos/ibc-go/blob/main/modules/apps/transfer/ibc_
 
 ## Next {hide}
 
-Learn about [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/intro.md) {hide}
+Learn about [building modules](https://github.com/cosmos/cosmos-sdk/blob/main/docs/docs/building-modules/01-intro.md) {hide}

docs/ibc/integration.md

@@ -139,7 +139,7 @@ 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/master/docs/building-modules/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/13-simulator.md).
 
 ```go
 // app.go

docs/ibc/overview.md

@@ -136,7 +136,7 @@ Proofs are passed from core IBC to light-clients as bytes. It is up to light cli
 [ICS-24 Host State Machine Requirements](https://github.com/cosmos/ics/tree/master/spec/core/ics-024-host-requirements). 
 - The proof format that all implementations must be able to produce and verify is defined in [ICS-23 Proofs](https://github.com/confio/ics23) implementation.
 
-### [Capabilities](https://github.com/cosmos/cosmos-sdk/blob/master/docs/core/ocap.md)
+### [Capabilities](https://github.com/cosmos/cosmos-sdk/blob/main/docs/docs/core/10-ocap.md)
 
 IBC is intended to work in execution environments where modules do not necessarily trust each
 other. Thus, IBC must authenticate module actions on ports and channels so that only modules with the

docs/ibc/relayer.md

@@ -7,7 +7,7 @@ order: 6
 ## Pre-requisites Readings
 
 - [IBC Overview](./overview.md) {prereq}
-- [Events](https://github.com/cosmos/cosmos-sdk/blob/master/docs/core/events.md) {prereq}
+- [Events](https://github.com/cosmos/cosmos-sdk/blob/main/docs/docs/core/08-events.md) {prereq}
 
 ## Events
 

modules/apps/transfer/spec/06_metrics.md

@@ -4,7 +4,7 @@ order: 6
 
 # Metrics
 
-The transfer IBC application module exposes the following set of [metrics](https://github.com/cosmos/cosmos-sdk/blob/master/docs/core/telemetry.md).
+The IBC transfer application module exposes the following set of [metrics](https://github.com/cosmos/cosmos-sdk/blob/main/docs/docs/core/09-telemetry.md).
 
 | Metric                          | Description                                                                               | Unit            | Type    |
 |:--------------------------------|:------------------------------------------------------------------------------------------|:----------------|:--------|