fix(picker): wrap vim.fn.expand cword in pcall to avoid Vim:E348 (#2961)

* fix(picker): wrap vim.fn.expand cword in pcall to avoid Vim:E348: No string under cursor

* run stylua

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Co-authored-by: James Trew <j.trew10@gmail.com>

lua/telescope/pickers.lua

@@ -529,7 +529,7 @@ function Picker:find()
   self:reset_selection()
 
   self.original_win_id = a.nvim_get_current_win()
-  self.original_cword = vim.fn.expand "<cword>"
+  _, self.original_cword = pcall(vim.fn.expand, "<cword>")
 
   -- User autocmd run it before create Telescope window
   vim.api.nvim_exec_autocmds("User", { pattern = "TelescopeFindPre" })