vim-patch:9.1.1320: filetype: alsoft config files are not recognized

Problem:  filetype: alsoft config files are not recognized
Solution: detect alsoft config files as dosini filetype
          (David Mandelberg)

References:
* code with paths to config: ReadALConfig() in
  https://github.com/kcat/openal-soft/blob/master/alc/alconfig.cpp
* example config:
  https://github.com/kcat/openal-soft/blob/master/alsoftrc.sample

closes: vim/vim#17140

1d96caaa4b

Co-authored-by: David Mandelberg <david@mandelberg.org>

runtime/lua/vim/filetype.lua

@@ -1548,6 +1548,10 @@ local filename = {
   ['nfs.conf'] = 'dosini',
   ['nfsmount.conf'] = 'dosini',
   ['.notmuch-config'] = 'dosini',
+  ['.alsoftrc'] = 'dosini',
+  ['alsoft.conf'] = 'dosini',
+  ['alsoft.ini'] = 'dosini',
+  ['alsoftrc.sample'] = 'dosini',
   ['pacman.conf'] = 'confini',
   ['paru.conf'] = 'confini',
   ['mpv.conf'] = 'confini',