please fix docs

[KevinNitroG]

https://github.com/xvzc/chezmoi.nvim/blob/fe3a012930f67f8863cbaedd0a64eab806eaea26/README.md?plain=1#L54-L69

The pattern should be replaced

  pattern = {
    (vim.fn.expand "~"):gsub("\\", "/") .. "/.local/share/chezmoi/*",
  },

On my windows machine os.getenv "HOME" doesn't work. Also pattern in autocommand, the path sep is / (even on Windows)

[vimkim]

This was really helpful for the windows use. Thank you!