nvim: Switch to the maintained galaxyline fork

See
https://github.com/NTBBloodbath/galaxyline.nvim
https://www.reddit.com/r/neovim/comments/pq3zvq/galaxylinenvim_is_back/

nvim/.config/nvim/after/plugin/galaxyline.lua

@@ -47,7 +47,7 @@ gls.left[3] = {
   FileIcon = {
     provider  = 'FileIcon',
     condition = condition.buffer_not_empty,
-    highlight = { require('galaxyline.provider_fileinfo').get_file_icon_color, colors.line_bg },
+    highlight = { require('galaxyline.providers.fileinfo').get_file_icon_color, colors.line_bg },
   },
 }
 gls.left[4] = {

nvim/.config/nvim/lua/plugins.lua

@@ -103,7 +103,7 @@ local init = function ()
   use 'inkarkat/SyntaxAttr.vim'
   -- For statusline
   use {
-    'glepnir/galaxyline.nvim',
+    'NTBBloodbath/galaxyline.nvim',
     requires = { 'kyazdani42/nvim-web-devicons' }
   }
   -- Marks and registers