docs: update code block syntax to use 'copy' for terminal commands

Author: Rel1cx

website/pages/docs/getting-started.mdx

@@ -4,7 +4,7 @@
 
 #### Install
 
-```sh filename="Terminal"
+```sh copy filename="Terminal"
 npm install --save-dev @eslint-react/eslint-plugin
 ```
 
@@ -69,7 +69,7 @@ export default tseslint.config({
 
 ### JavaScript with Babel
 
-```sh filename="Terminal"
+```sh copy filename="Terminal"
 npm install --save-dev @babel/core @babel/eslint-parser @babel/preset-env @babel/preset-react @eslint-react/eslint-plugin
 ```