Added the KiCad backup folder to the .gitignore file

.gitignore

@@ -1,6 +1,9 @@
-#Exclude the W800 SDK bin folder from the project
+#Exclude the W800 SDK bin folder from the the git repository
 src/W800 SDK v1.00.08/bin/
 
-#Exclude the lvgl simulator bin and obj folders from the project
+#Exclude the lvgl simulator bin and obj folders from the the git repository
 src/lvgl_win_sim/lv_port_win_codeblocks/bin
-src/lvgl_win_sim/lv_port_win_codeblocks/obj
+src/lvgl_win_sim/lv_port_win_codeblocks/obj
+
+#Exclude the KiCad backup folder from the git repository
+design/KiCad/W800_Smart_Watch/W800_Smart_Watch-backups