fix missing current_page assignment, indicator update in goto_page

Author: krittick

discord/ext/pages/pagination.py

@@ -380,6 +380,12 @@ async def goto_page(self, page_number=0) -> discord.Message:
             The message associated with the paginator.
         """
         self.update_buttons()
+        self.current_page = page_number
+        if self.show_indicator:
+            self.buttons["page_indicator"][
+                "object"
+            ].label = f"{self.current_page + 1}/{self.page_count + 1}"
+
         page = self.pages[page_number]
         page = self.get_page_content(page)