vim-patch:9.1.0929: filetype: lalrpop files are not recognized

Problem:  filetype: lalrpop files are not recognized
Solution: detect '*.lalrpop' files as lalrpop filetype
          (David Thievon)

References:
https://github.com/lalrpop/lalrpop

closes: vim/vim#16223

5a2e0cf5f1

Co-authored-by: David Thievon <pdkfan@gmail.com>

runtime/lua/vim/filetype.lua

@@ -672,6 +672,7 @@ local extension = {
   k = 'kwt',
   ACE = 'lace',
   ace = 'lace',
+  lalrpop = 'lalrpop',
   latte = 'latte',
   lte = 'latte',
   ld = 'ld',