fix broken link

Author: shahbaz17

docs/sdk/pnp/flutter/usage.mdx

@@ -635,11 +635,11 @@ method currently supports only the signing methods.
 
 ### Arguments
 
-| Arguments       | Description                                                                                                                                                                                                                                                          |
-| --------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| `chainConfig`   | Defines the chain to be used for signature.                                                                                                                                                                                                                          |
-| `method`        | JSON RPC method name in `String`. Currently, the request method only supports the singing methods.                                                                                                                                                                   |
-| `requestParams` | Parameters for the corresponding method. The parameters should be in the list and correct sequence. Take a look at [RPC methods](<[https://docs.metamask.io/wallet/reference/json-rpc-api/](https://docs.metamask.io/wallet/reference/json-rpc-api/)>) to know more. |
+| Arguments       | Description                                                                                                                                                                                            |
+| --------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
+| `chainConfig`   | Defines the chain to be used for signature.                                                                                                                                                            |
+| `method`        | JSON RPC method name in `String`. Currently, the request method only supports the singing methods.                                                                                                     |
+| `requestParams` | Parameters for the corresponding method. The parameters should be in the list and correct sequence. Take a look at [RPC methods](https://docs.metamask.io/wallet/reference/json-rpc-api) to know more. |
 
 ### Usage