docs: fixed minor typo (hoffstadt#2118)

There was a letter missing in the alphabet in a widget, added it.

dearpygui/demo.py

@@ -371,7 +371,7 @@ def _log(sender, app_data, user_data):
 
             with dpg.tree_node(label="Combo"):
 
-                items = ("A","B","C","D","E","F","G","H","I","J","K","L","M" "O","P","Q","R","S","T","U","V","W","X","Y","Z")
+                items = ("A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z")
                 combo_id = dpg.add_combo(items, label="combo", height_mode=dpg.mvComboHeight_Small)
                 _add_config_options(combo_id, 1, "popup_align_left", "no_arrow_button", "no_preview")
 
@@ -2811,4 +2811,4 @@ def _framebuffer_callback(sender, app_data):
                         dpg.show_item("__demo_texture_container")
                         dpg.add_dynamic_texture(app_data.get_width(), app_data.get_height(), app_data, parent="__demo_texture_container")
                     dpg.add_text("Outputs frame buffer an mvBuffer object, creates a dynamic texture, and shows the texture registry (check final item)")
-                    dpg.add_button(label="Output Framebuffer", callback=lambda:dpg.output_frame_buffer(callback=_framebuffer_callback))
+                    dpg.add_button(label="Output Framebuffer", callback=lambda:dpg.output_frame_buffer(callback=_framebuffer_callback))