nvim: Replace live grep key chord with fw

Moved the old, a little more cumbersome, mapping <leader>fF to be
<leader>fw instead to start live grepping with telescope.

nvim/.config/nvim/lua/maps.lua

@@ -155,7 +155,7 @@ map('n', '<leader>fh',
     ":lua require 'telescope.builtin'.find_files({hidden=true})<cr>",
     { desc = 'find hidden files' })
 -- general full-text search in cwd with rg
-map('n', '<leader>fF', ":lua require 'telescope.builtin'.live_grep()<cr>",
+map('n', '<leader>fw', ":lua require 'telescope.builtin'.live_grep()<cr>",
     { desc = 'grep search' })
 
 -- git status