vim-patch:9.0.1288: FunC files are not recognized (#22153)

Problem:    FunC files are not recognized.
Solution:   Recognize FunC files. (Amaan Qureshi, closes vim/vim#11949)

91deac4539

Co-authored-by: Amaan Qureshi <amaanq12@gmail.com>

runtime/lua/vim/filetype.lua

@@ -423,6 +423,7 @@ local extension = {
   fsh = 'fsh',
   fsi = 'fsharp',
   fsx = 'fsharp',
+  fc = 'func',
   fusion = 'fusion',
   gdb = 'gdb',
   gdmo = 'gdmo',