vim-patch:9.0.1368: Bass files are not recognized (#22485)

Problem:    Bass files are not recognized.
Solution:   Add patterns for Bass files. (Amaan Qureshi, closes vim/vim#12088)

4ed914b18a

runtime/lua/vim/filetype.lua

@@ -156,6 +156,7 @@ local extension = {
   bas = function(path, bufnr)
     return require('vim.filetype.detect').bas(bufnr)
   end,
+  bass = 'bass',
   bi = function(path, bufnr)
     return require('vim.filetype.detect').bas(bufnr)
   end,