Make ^NOTE in markdown/html files bold

2012/zeitak/README.md

@@ -25,7 +25,7 @@ text files that are not code.
     ./try.sh
 ```
 
-NOTE: the program prints an error and exits on the first nesting error so it
+**NOTE**: the program prints an error and exits on the first nesting error so it
 will not detect multiple issues.
 
 
@@ -58,7 +58,7 @@ At one point we spent
 minutes](https://web.archive.org/web/20130925190722/https://twitter.com/ioccc/status/252162898800033792)
 just to understand _18 key **characters**_ of this code.
 
-NOTE: if you use vim to view the code, make sure to do:
+**NOTE**: if you use vim to view the code, make sure to do:
 
 ```
     :set tabstop=4

2012/zeitak/index.html

@@ -419,7 +419,7 @@ try <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/zeita
 text files that are not code.</p>
 <h2 id="try">Try:</h2>
 <pre><code>    ./try.sh</code></pre>
-<p>NOTE: the program prints an error and exits on the first nesting error so it
+<p><strong>NOTE</strong>: the program prints an error and exits on the first nesting error so it
 will not detect multiple issues.</p>
 <h2 id="alternate-code">Alternate code:</h2>
 <p>The alternate code, <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2012/zeitak/zeitak.alt.c">zeitak.alt.c</a>, is a version that was slightly
@@ -436,7 +436,7 @@ At one point we spent
 <a href="https://web.archive.org/web/20130925190722/https://twitter.com/ioccc/status/252162898800033792">18
 minutes</a>
 just to understand <em>18 key <strong>characters</strong></em> of this code.</p>
-<p>NOTE: if you use vim to view the code, make sure to do:</p>
+<p><strong>NOTE</strong>: if you use vim to view the code, make sure to do:</p>
 <pre><code>    :set tabstop=4</code></pre>
 <p>in command mode, before looking at the code, to see the correct layout.</p>
 <p>For more help, see the