docs(php): Clément's review

Author: damcou

website/docs/clients/guides/customized-client-usage.mdx

@@ -117,7 +117,7 @@ $client = SearchClient::create(
     '<YOUR_APP_ID>'
 );
 
-// This will append `; my user agent (optional version)` to the current value of `x-algolia-agent` for every requests
+// This will append `; my user agent (optional version)` to the current value of `User-Agent` for every requests
 Algolia\AlgoliaSearch\Support\AlgoliaAgent::addAlgoliaAgent(
     $client->getClientConfig()->getClientName(),
     "my user agent",

website/docs/clients/migration-guides/index.mdx

@@ -220,6 +220,7 @@ $client = SearchClient::create(
 $response = $client->operationIndex(
     '<SOURCE_INDEX_NAME>',
     [
+        // Enum for either `copy` or `move`
         'operation' => 'copy', // 'move'
         'destination' => '<DESTINATION_INDEX_NAME>'
     ]

website/docs/clients/migration-guides/php.md

@@ -5,7 +5,7 @@ title: PHP
 | Previous             | Latest                                 | Description                                                                                                                                                                                                               |
 | -------------------- | :------------------------------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
 | `"algolia/algoliasearch-client-php": "^3.2"`           | `"algolia/algoliasearch-client-php": "^4.0@alpha"`  | **During the beta phase**, the clients are available under the package 4.x.x-alpha , you can find a full list [here](https://packagist.org/packages/algolia/algoliasearch-client-php).      |
-| `Algolia\AlgoliaSearch`             | `Algolia\AlgoliaSearch\Api`                         | Exported clients have now the name suffixed by `Api`.                                                                                                                                                                                |
+| `Algolia\AlgoliaSearch`             | `Algolia\AlgoliaSearch\Api`                         | Exported clients have now the namespace suffixed by `Api`.                                                                                                                                                                                |
 
 ### Usage