fix docs imports

Author: hipstersmoothie

packages/docs/src/content/docs/guides/browser.mdx

@@ -32,7 +32,7 @@ There are a few main ways to use Jimp in the browser.
 You can initialize a Jimp instance from a URL or a file path.
 
 ```ts
-import Jimp from "jimp";
+import { Jimp } from "jimp";
 
 // Read a file hosted on the same domain
 const image1 = await Jimp.read("/some/url");

packages/docs/src/content/docs/guides/getting-started.mdx

@@ -38,7 +38,7 @@ The workflow for using jimp
 1. Load an image.
 
    ```ts
-   import Jimp from "jimp";
+   import { Jimp } from "jimp";
 
    const image = await Jimp.read("test/image.png");
    ```

packages/docs/src/content/docs/index.mdx

@@ -44,7 +44,7 @@ Load an image, manipulate it, and save it.
 1. Load an image.
 
    ```ts
-   import Jimp from "jimp";
+   import { Jimp } from "jimp";
 
    const image = await Jimp.read("test/image.png");
    ```