fix example

Author: manu4543

README.md

@@ -205,7 +205,7 @@ import { IKImage, IKVideo, IKContext, IKUpload } from 'imagekitio-react'
         }
       ]
     }}
-    checks="file.size < 1mb" // To run server side checks before uploading files
+    checks=`"file.size" < "1mb"` // To run server side checks before uploading files. Notice the quotes around file.size and 1mb.
   />
 </IKContext>
 ```
@@ -627,7 +627,7 @@ The SDK provides the `IKUpload` component to upload files to the [ImageKit Media
 | urlEndpoint             | String                                                     | Optional. If not specified, the URL-endpoint specified in the parent `IKContext` component is used. For example, https://ik.imagekit.io/your_imagekit_id/endpoint/                                                                                                                                                                                                                                                      |
 | publicKey               | String                                                     | Optional. If not specified, the `publicKey` specified in the parent `IKContext` component is used.                                                                                                                                                                                                                                                                                                                      |
 | authenticator           | ()=>Promise<{signature:string,token:string,expiry:number}> | Optional. If not specified, the `authenticator` specified in the parent `IKContext` component is used.                                                                                                                                                                                                                                                                                                                  |
-| checks | String | Optional. Run server-side checks before uploading files. For example, `size < 1mb` will check if the file size is less than 1 MB. Check [Upload API docs](https://imagekit.io/docs/api-reference/upload-file/upload-file#upload-api-checks) to learn more. |
+| checks | String | Optional. Run server-side checks before uploading files. For example, `"file.size" < "1mb"` will check if the file size is less than 1 MB. Check [Upload API docs](https://imagekit.io/docs/api-reference/upload-file/upload-file#upload-api-checks) to learn more. Notice the quotes around `file.size` and `1mb`; otherwise, you will get an error `Your request contains invalid syntax for the checks parameter.` |
 
 
 > Make sure that you have specified `authenticator` and `publicKey` in `IKUpload` or in the parent `IKContext` component as a prop. The authenticator expects an asynchronous function that resolves with an object containing the necessary security parameters i.e `signature`, `token`, and `expire`.