Make ^NOTE in markdown/html files bold

2019/karns/README.md

@@ -4,7 +4,7 @@
     make
 ```
 
-NOTE: we disable the optimiser because this program has problems with it
+**NOTE**: we disable the optimiser because this program has problems with it
 enabled.
 
 

2019/karns/index.html

@@ -410,7 +410,7 @@ Location: <a href="../../location.html#US">US</a> - <em>United States of America
 <!-- BEFORE: 1st line of markdown file: 2019/karns/README.md -->
 <h2 id="to-build">To build:</h2>
 <pre><code>    make</code></pre>
-<p>NOTE: we disable the optimiser because this program has problems with it
+<p><strong>NOTE</strong>: we disable the optimiser because this program has problems with it
 enabled.</p>
 <h3 id="bugs-and-misfeatures">Bugs and (Mis)features:</h3>
 <p>The current status of this entry is:</p>