cheat sheet: Suggest git-restore for discarding changes

In modern versions of Git, `git status` will suggest using `git restore` in these cases. Also, in all other instances, the cheat sheet already lists `git switch` or `git restore` alternatives to `git checkout`.

Author: sckfranke

content/cheat-sheet/_index.html

@@ -212,10 +212,14 @@ <h2 id="ways-to-refer-to-a-commit">Ways to refer to a commit</h2>
     <h2 id="discard-your-changes">Discard Your Changes</h2>
     <div class="item">
       <h3>Delete unstaged changes to one file:</h3>
+      <code>git restore &lt;file&gt;</code>
+      <span class="or">OR</span>
       <code>git checkout &lt;file&gt;</code>
     </div>
     <div class="item">
       <h3>Delete all staged and unstaged changes to one file:</h3>
+      <code>git restore --staged --worktree &lt;file&gt;</code>
+      <span class="or">OR</span>
       <code>git checkout HEAD &lt;file&gt;</code>
     </div>
     <div class="item">