updated modified icon

plug-config/xtabline.vim

@@ -9,8 +9,10 @@ let g:xtabline_settings.enable_persistance = 0
 " let g:xtabline_settings.last_open_first = 1
 let g:xtabline_lazy = 1
 
+let g:xtabline_settings.show_right_corner = 0
+
 let g:xtabline_settings.indicators = {
-      \ 'modified': '+',
+      \ 'modified': '●',
       \ 'pinned': '[📌]',
       \}