Update links after renaming accounts.md to index.md

docs/use-cases/defi/list-xrp-as-an-exchange.md

@@ -97,7 +97,7 @@ See also:
 
 * [Issuing and Operational Addresses](../../concepts/accounts/account-types.md)
 
-* [Creating Accounts](../../concepts/accounts/accounts.md#creating-accounts)
+* [Creating Accounts](../../concepts/accounts/index.md#creating-accounts)
 
 * [Reserves](../../concepts/accounts/reserves.md)
 
@@ -608,7 +608,7 @@ Off-Ledger Balances</td>
 ## See Also
 
 - **Concepts:**
-    - [Accounts](../../concepts/accounts/accounts.md)
+    - [Accounts](../../concepts/accounts/index.md)
     - [Direct XRP Payments](../../concepts/payment-types/direct-xrp-payments.md)
     - [Partial Payments](../../concepts/payment-types/partial-payments.md)
     - [Source and Destination Tags](../../concepts/transactions/source-and-destination-tags.md)

docs/use-cases/payments/peer-to-peer-payments-uc.md

@@ -20,7 +20,7 @@ Before jumping into using the XRP Ledger to handle direct payments, you should s
 
 Before creating an account, you must decide which XRP Ledger network to use. There are multiple networks for different use cases, but native XRP transactions only happen on `Mainnet`. See: [Parallel Networks](../../concepts/networks-and-servers/parallel-networks.md)
 
-Most publicly available wallets offer the ability to create an account for you and can generate a public and private key. If they don't, you can create an account yourself, so long as it's mathematically valid. See: [Creating Accounts](../../concepts/accounts/accounts.md#creating-accounts).
+Most publicly available wallets offer the ability to create an account for you and can generate a public and private key. If they don't, you can create an account yourself, so long as it's mathematically valid. See: [Creating Accounts](../../concepts/accounts/index.md#creating-accounts).
 
 
 ## Fund Your Account