refactor(lua): replace hard-coded gsub with vim.pesc()

runtime/lua/vim/filetype.lua

@@ -1490,7 +1490,7 @@ local function normalize_path(path, as_pattern)
     if as_pattern then
       -- Escape Lua's metacharacters when $HOME is used in a pattern.
       -- The rest of path should already be properly escaped.
-      normal = vim.env.HOME:gsub('[-^$()%%.%[%]+?]', '%%%0') .. normal:sub(2)
+      normal = vim.pesc(vim.env.HOME) .. normal:sub(2)
     else
       normal = vim.env.HOME .. normal:sub(2)
     end