updated links with rc0 tag

docs/migrations/v7-to-v7_1.md

@@ -18,13 +18,12 @@ There are four sections based on the four potential user groups of this document
 
 In the previous release of ibc-go, the localhost `v1` light client module was deprecated and removed. The ibc-go `v7.1.0` release introduces `v2` of the 09-localhost light client module.
 
-<!-- TODO: Update the links to use release version instead of feat branch -->
-An [automatic migration handler](https://github.com/cosmos/ibc-go/blob/release/v7.1.x/modules/core/module.go#L127-L145) is configured in the core IBC module to set the localhost `ClientState` and sentinel `ConnectionEnd` in state.
+An [automatic migration handler](https://github.com/cosmos/ibc-go/blob/v7.1.0-rc0/modules/core/module.go#L127-L145) is configured in the core IBC module to set the localhost `ClientState` and sentinel `ConnectionEnd` in state.
 
 In order to use the 09-localhost client chains must update the `AllowedClients` parameter in the 02-client submodule of core IBC. This can be configured directly in the application upgrade handler or alternatively updated via the legacy governance parameter change proposal.
 We __strongly__ recommend chains to perform this action so that intra-ledger communication can be carried out using the familiar IBC interfaces.
 
-See the upgrade handler code sample provided below or [follow this link](https://github.com/cosmos/ibc-go/blob/release/v7.1.x/testing/simapp/upgrades/upgrades.go#L85) for the upgrade handler used by the ibc-go simapp.
+See the upgrade handler code sample provided below or [follow this link](https://github.com/cosmos/ibc-go/blob/v7.1.0-rc0/testing/simapp/upgrades/upgrades.go#L85) for the upgrade handler used by the ibc-go simapp.
 
 ```go
 func CreateV7LocalhostUpgradeHandler(
@@ -45,7 +44,7 @@ func CreateV7LocalhostUpgradeHandler(
 
 ### Transfer migration
 
-An [automatic migration handler](https://github.com/cosmos/ibc-go/blob/release/v7.1.x/modules/apps/transfer/module.go#L111-L113) is configured in the transfer module to set the total amount in escrow for all denominations of coins that have been sent out. For each denomination a state entry is added with the total amount of coins in escrow regardless of the channel from which they were transferred.
+An [automatic migration handler](https://github.com/cosmos/ibc-go/blob/v7.1.0-rc0/modules/apps/transfer/module.go#L111-L113) is configured in the transfer module to set the total amount in escrow for all denominations of coins that have been sent out. For each denomination a state entry is added with the total amount of coins in escrow regardless of the channel from which they were transferred.
 
 ## IBC Apps