chore: cleanup firefox thanks

docs/2023-06-25-useful-tools.html

@@ -1266,16 +1266,7 @@ defaults -currentHost write -globalDomain NSStatusItemSpacing -int 6</pre
         </ul>
       </li>
     </ul>
-    <div class="markdown-heading">
-      <h2 class="heading-element">Thanks</h2>
-      <a
-        id="user-content-thanks"
-        class="anchor"
-        aria-label="Permalink: Thanks"
-        href="#thanks"
-        ><span aria-hidden="true" class="octicon octicon-link"></span
-      ></a>
-    </div>
+    <p>Thanks:</p>
     <ul>
       <li>
         <a

posts/2023-06-25-useful-tools.md

@@ -348,7 +348,7 @@ Thanks:
 - Experiment
   - `image.jxl.enabled`: true
 
-## Thanks
+Thanks:
 
 - [My list of useful command line tools](https://boyter.org/posts/my-list-of-useful-command-line-tools/)
 - [Useful Customizations for Firefox](http://www.quippd.com/firefox/wiki/useful-customizations/)