vim-patch:9.1.0612: filetype: deno.lock file not recognized

Problem:  filetype: deno.lock file not recognized
Solution: detect 'deno.lock' as json filetype
          (カワリミ人形)

Reference:
https://docs.deno.com/runtime/manual/basics/modules/integrity_checking/#caching-and-lock-files

closes: vim/vim#15333

df77c8ad39

Co-authored-by: カワリミ人形 <kawarimidoll+git@gmail.com>

runtime/lua/vim/filetype.lua

@@ -1492,6 +1492,7 @@ local filename = {
   ['.prettierrc'] = 'json',
   ['.stylelintrc'] = 'json',
   ['.lintstagedrc'] = 'json',
+  ['deno.lock'] = 'json',
   ['flake.lock'] = 'json',
   ['.babelrc'] = 'jsonc',
   ['.eslintrc'] = 'jsonc',