add support of WriteAccessAllowed#webAppName

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/Common.kt

@@ -605,4 +605,5 @@ const val temporaryRegistrationField = "temporary_registration"
 
 const val buttonTextField = "button_text"
 const val webAppField = "web_app"
+const val webAppNameField = "web_app_name"
 const val menuButtonField = "menu_button"

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/message/ChatEvents/forum/WriteAccessAllowed.kt

@@ -1,7 +1,12 @@
 package dev.inmo.tgbotapi.types.message.ChatEvents.forum
 
 import dev.inmo.tgbotapi.types.message.ChatEvents.abstracts.ForumEvent
+import dev.inmo.tgbotapi.types.webAppNameField
+import kotlinx.serialization.SerialName
 import kotlinx.serialization.Serializable
 
 @Serializable
-object WriteAccessAllowed : ForumEvent
+data class WriteAccessAllowed(
+    @SerialName(webAppNameField)
+    val webAppName: String? = null
+) : ForumEvent