vim-patch:9.0.1394: Unx Tal files are not recognized (#22579)

Problem:    Unx Tal files are not recognized.
Solution:   Add a pattern for Unx Tal files. (Amaan Qureshi, closes vim/vim#12117)

cde1f8714e

runtime/lua/vim/filetype.lua

@@ -1015,6 +1015,7 @@ local extension = {
   svh = 'systemverilog',
   sv = 'systemverilog',
   tak = 'tak',
+  tal = 'tal',
   task = 'taskedit',
   tm = 'tcl',
   tcl = 'tcl',