vim-patch:9.1.2034: filetype: Fennel fnml files are not recognized (#37176)

Problem:  filetype: Fennel fnml files are not recognized
          (Alexei Mozaidze)
Solution: Detect *.fnml files as fennel filetype

Reference:
- https://fennel-lang.org/changelog#160--2025-10-13

fixes: vim/vim#19047

9c87af5c3c

Co-authored-by: Christian Brabandt <cb@256bit.org>

runtime/lua/vim/filetype.lua

@@ -472,6 +472,7 @@ local extension = {
   fwt = 'fan',
   lib = 'faust',
   fnl = 'fennel',
+  fnml = 'fennel',
   fga = 'fga',
   m4gl = 'fgl',
   ['4gl'] = 'fgl',