refactor: use LazyVim.is_win()

lua/lazyvim/plugins/coding.lua

@@ -70,7 +70,7 @@ return {
   -- snippets
   {
     "L3MON4D3/LuaSnip",
-    build = (not jit.os:find("Windows"))
+    build = (not LazyVim.is_win())
         and "echo 'NOTE: jsregexp is optional, so not a big deal if it fails to build'; make install_jsregexp"
       or nil,
     dependencies = {