docs: update cheat sheet

CHEATSHEET.md

@@ -1,8 +1,7 @@
-# Neovim command and keybind cheat sheet
+# Neovim cheat sheet
 
 ## BASICS
 
-- `;` leader key
 - `:checkhealth [<pluginname>]` check base or plugin status
 - `:checkhealth vim.lsp` show details of LSP attached to buffer
 - `:verbose set expandtab?` check where `expandtab` has been set last
@@ -89,6 +88,7 @@
 - `cc` replace whole line
 - `C` replace to the end of the line
 - `yy` copy the current line
+- `yygccp` comment and copy the current line
 - `yap` "yank-around-paragraph"
 - `yip` "yank-inside-paragraph"
 - `yaW` copy word w/ dashes/underscores
@@ -121,3 +121,4 @@
 - `gf` open file under cursor in a new buffer
 - `gx` open link under cursor in default browser
 - `*` search word under cursor
+- `Ctrl`+`l` remove search highlight