fix(general behavior): update winbar on BufModifiedSet

Author: bekaboo

README.md

@@ -171,6 +171,7 @@ https://github.com/Bekaboo/dropbar.nvim/assets/76579810/e8c1ac26-0321-4762-9975-
           and not vim.wo[win].diff
       end,
       update_events = {
+        'BufModifiedSet',
         'CursorMoved',
         'CursorMovedI',
         'DirChanged',
@@ -500,6 +501,7 @@ general behavior of the plugin:
   - Default:
     ```lua
     {
+      'BufModifiedSet',
       'CursorMoved',
       'CursorMovedI',
       'DirChanged',

doc/dropbar.txt

@@ -168,6 +168,7 @@ behavior of the plugin:
     - Default: >lua
 
             {
+              'BufModifiedSet',
               'CursorMoved',
               'CursorMovedI',
               'DirChanged',

lua/dropbar/configs.lua

@@ -11,6 +11,7 @@ M.opts = {
         and not vim.wo[win].diff
     end,
     update_events = {
+      'BufModifiedSet',
       'CursorMoved',
       'CursorMovedI',
       'DirChanged',