docs(readme): update README

README.md

@@ -10,6 +10,7 @@
 - ⚡ Real-time streaming responses via Kotlin Flows
 - 🧩 Rich, idiomatic DSL for clean and expressive syntax
 - 🔒 Ensures required validations are met before request submission
+- 🔧 Allows specifying default values for API requests in client configuration
 - ⏳ Automatically handles rate limiting and retries on failed requests
 - 📱 Supports multiple platforms:
   - Android
@@ -50,6 +51,22 @@ val apiKey = getenv("GROQ_API_KEY")!!.toKString() // Native
 val client = Groq(apiKey)
 ```
 
+### Specifying default values
+You can configure default values for requests. These values will be automatically applied to every request made with a DSL function.
+```kotlin
+val client = Groq(apiKey) {
+  defaults {
+    chatCompletion {
+      model = GroqModel.LLAMA_3_8B_8192
+    }
+
+    audioTranscription {
+      format = AudioResponseFormat.VERBOSE_JSON
+    }
+  }
+}
+```
+
 ### Chat completion
 ```kotlin
 val response = client.chat {