docs: fix package name in babel config docs (#10666)

Author: kyletsang

website/docs/configuration.mdx

@@ -280,7 +280,7 @@ Docusaurus transpiles your site's source code using Babel by default. If you wan
 To use the built-in preset as a base configuration, install the following package and use it
 
 ```bash npm2yarn
-npm install --save @docusaurus/theme-live-codeblock
+npm install --save @docusaurus/babel
 ```
 
 Then use the preset in your `babel.config.js` file:

website/versioned_docs/version-3.6.1/configuration.mdx

@@ -280,7 +280,7 @@ Docusaurus transpiles your site's source code using Babel by default. If you wan
 To use the built-in preset as a base configuration, install the following package and use it
 
 ```bash npm2yarn
-npm install --save @docusaurus/theme-live-codeblock
+npm install --save @docusaurus/babel
 ```
 
 Then use the preset in your `babel.config.js` file: