bug: no results for command + mark combinations

[MariaSolOs]

Did you check docs and existing issues?

• [X] I have read all the which-key.nvim docs
• [X] I have searched the existing issues of which-key.nvim
• [X] I have searched the existing issues of plugins related to this issue

Neovim version (nvim -v)

v0.10.0-dev-722+g7668f89d5

Operating system/version

Mac Ventura 13.4.1

Describe the bug

Certain commands can be used in combination with a motion. For example: d't deletes the lines from the cursor position to mark t. However, upon pressing the prefix of such a command WhichKey doesn't display a result for ` or '.

Steps To Reproduce

1. In a given file, type mm to create a new mark.
2. Type d. WhichKey should open to display options to choose from.
3. Notice how there's no result for `.

Expected Behavior

For ` and ' to appear in the results list mentioned in step 2 above.

Repro

-- DO NOT change the paths and don't remove the colorscheme
local root = vim.fn.fnamemodify("./.repro", ":p")

-- set stdpaths to use .repro
for _, name in ipairs({ "config", "data", "state", "cache" }) do
  vim.env[("XDG_%s_HOME"):format(name:upper())] = root .. "/" .. name
end

-- bootstrap lazy
local lazypath = root .. "/plugins/lazy.nvim"
if not vim.loop.fs_stat(lazypath) then
  vim.fn.system({ "git", "clone", "--filter=blob:none", "https://github.com/folke/lazy.nvim.git", lazypath, })
end
vim.opt.runtimepath:prepend(lazypath)

-- install plugins
local plugins = {
  "folke/tokyonight.nvim",
  { "folke/which-key.nvim", config = true },
  -- add any other plugins here
}
require("lazy").setup(plugins, {
  root = root .. "/plugins",
})

vim.cmd.colorscheme("tokyonight")
-- add anything else here

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