doc: remove duplicate listItem of RetryHandler.md & RetryHandler.md (#4948)

* doc: fix typo of RetryHandler.md

* doc: fix typo of RetryAgent.md

Author: samuel871211

docs/docs/api/RetryAgent.md

@@ -23,7 +23,6 @@ Returns: `ProxyAgent`
 - **minTimeout** `number` (optional) - Minimum number of milliseconds to wait before retrying. Default: `500` (half a second)
 - **timeoutFactor** `number` (optional) - Factor to multiply the timeout by for each retry attempt. Default: `2`
 - **retryAfter** `boolean` (optional) - It enables automatic retry after the `Retry-After` header is received. Default: `true`
--
 - **methods** `string[]` (optional) - Array of HTTP methods to retry. Default: `['GET', 'PUT', 'HEAD', 'OPTIONS', 'DELETE']`
 - **statusCodes** `number[]` (optional) - Array of HTTP status codes to retry. Default: `[429, 500, 502, 503, 504]`
 - **errorCodes** `string[]` (optional) - Array of Error codes to retry. Default: `['ECONNRESET', 'ECONNREFUSED', 'ENOTFOUND', 'ENETDOWN','ENETUNREACH', 'EHOSTDOWN', 'UND_ERR_SOCKET']`

docs/docs/api/RetryHandler.md

@@ -26,7 +26,6 @@ Extends: [`Dispatch.DispatchOptions`](/docs/docs/api/Dispatcher.md#parameter-dis
 - **minTimeout** `number` (optional) - Minimum number of milliseconds to wait before retrying. Default: `500` (half a second)
 - **timeoutFactor** `number` (optional) - Factor to multiply the timeout by for each retry attempt. Default: `2`
 - **retryAfter** `boolean` (optional) - It enables automatic retry after the `Retry-After` header is received. Default: `true`
--
 - **methods** `string[]` (optional) - Array of HTTP methods to retry. Default: `['GET', 'PUT', 'HEAD', 'OPTIONS', 'DELETE']`
 - **statusCodes** `number[]` (optional) - Array of HTTP status codes to retry. Default: `[429, 500, 502, 503, 504]`
 - **errorCodes** `string[]` (optional) - Array of Error codes to retry. Default: `['ECONNRESET', 'ECONNREFUSED', 'ENOTFOUND', 'ENETDOWN','ENETUNREACH', 'EHOSTDOWN', 'UND_ERR_SOCKET']`