[docs] Update broken links (MystenLabs#16086)

## Description 

Updated broken links found in the TS SDK migration page.

## Test Plan 

How did you test the new or updated feature?

---
If your changes are not user-facing and do not break anything, you can
skip the following section. Otherwise, please briefly describe what has
changed under the Release Notes section.

### Type of Change (Check all that apply)

- [ ] protocol change
- [ ] user-visible impact
- [ ] breaking change for a client SDKs
- [ ] breaking change for FNs (FN binary must upgrade)
- [ ] breaking change for validators or node operators (must upgrade
binaries)
- [ ] breaking change for on-chain data layout
- [ ] necessitate either a data wipe or data migration

### Release notes

sdk/docs/pages/typescript/index.mdx

@@ -51,15 +51,15 @@ the complete SDK module. Now, you upload the individual packages of the SDK modu
 The Sui TypeScript SDK deprecates the following classes with version 0.38.0:
 
 - `JsonRpcProvider` - The `JsonRpcProvider` class is deprecated in favor of the `suiClient` class
-  when creating a client for a Sui network. See [Network Interactions with SuiClient](sui-client)
-  for more information.
+  when creating a client for a Sui network. See
+  [Network Interactions with SuiClient](typescript/sui-client) for more information.
 - `SignerWithProver` and `RawSigner` - Key pairs now directly support signing transactions and
   messages without the need of a `Signer` class. See the [Key pairs](cryptography/keypairs) topic
   for more information.
 - `signAndExecuteTransactionBlock` - This method was not deprecated, but is now part of `SuiClient`.
 - `Connection` classes - The `Connection` classes (`Connection`, `devnetConnection`, and so on) have
   been deprecated in favor of using `suiClient` for establishing the connection. See
-  [Network Interactions with SuiClient](sui-client) for more information.
+  [Network Interactions with SuiClient](typescript/sui-client) for more information.
 - The `superstruct` type definitions for `JsonRPCProvider` types are replaced with generated types
   exported from `@mysten/sui.js/client`. The new type definitions are pure TypeScript types that you
   can't use for runtime validation.
@@ -70,7 +70,7 @@ The Sui TypeScript SDK deprecates the following classes with version 0.38.0:
 
 Signing and sending transaction blocks changes slightly with the deprecation of the `Signer`
 pattern. For an example of transaction signing, see the
-[Sui Programmable Transaction Blocks Basics](basics) topic.
+[Sui Programmable Transaction Blocks Basics](typescript/transaction-building/basics) topic.
 
 ### Faucet requests