Added the method UnpinAllGeneralForumTopicMessages

Author: mircoianese

library/src/main/java/com/pengrad/telegrambot/request/UnpinAllGeneralForumTopicMessages.java

@@ -0,0 +1,19 @@
+package com.pengrad.telegrambot.request;
+
+import com.pengrad.telegrambot.response.BaseResponse;
+
+/**
+ * 22 August 2023
+ */
+public class UnpinAllGeneralForumTopicMessages extends BaseRequest<UnpinAllGeneralForumTopicMessages, BaseResponse> {
+
+    public UnpinAllGeneralForumTopicMessages(Long chatId) {
+        this(chatId.toString());
+    }
+
+    public UnpinAllGeneralForumTopicMessages(String chatId) {
+        super(BaseResponse.class);
+        add("chat_id", chatId);
+    }
+
+}