Fix missing Chat history comments

Author: erdemkose

README.md

@@ -25,6 +25,7 @@ _This library is not developed or endorsed by Google._
     - [Text Generation using Image File](#text-generation-using-image-file)
     - [Text Generation using Image Data](#text-generation-using-image-data)
     - [Chat Session (Multi-Turn Conversations)](#chat-session-multi-turn-conversations)
+    - [Chat Session with History](#chat-session-with-history)
     - [Text Embeddings](#text-embeddings)
     - [Tokens counting](#tokens-counting)
     - [Listing models](#listing-models)

src/Facades/Gemini.php

@@ -14,8 +14,10 @@
  * @method static string generateText(string $prompt)
  * @method static string generateTextUsingImage(string $imageType, string $image, string $prompt = '')
  * @method static string generateTextUsingImageFile(string $imageType, string $imagePath, string $prompt = '')
- * @method static ChatSession startChat()
  * @method static Model[] listModels()
+ *
+ * @param array<int, array{message: string, role: string}> $history
+ * @method static ChatSession startChat(array $history)
  */
 class Gemini extends Facade
 {