fix(picker.actions): ensure the current window is updated after tabdrop (#2326)

## Description

Update the winid (in the `win` variable) after `tab drop`.

## Related Issue(s)

Without this patch, when the user set `confirm` to `{ action =
"confirm", cmd = "tabdrop" }` and jump to a location in a different tab,
since the `win` is still pointing to the original window (tab), there'd
be a `Cursor position outside buffer` error.

lua/snacks/picker/actions.lua

@@ -89,6 +89,7 @@ function M.jump(picker, _, action)
       drop[#drop + 1] = vim.fn.fnameescape(path)
     end
     vim.cmd(cmd .. " " .. table.concat(drop, " "))
+    win = vim.api.nvim_get_current_win()
   else
     for i, item in ipairs(items) do
       -- load the buffer