Fix links to HDate and HebrewCalendar

Author: mjradwin

api/core/index.html

@@ -12,8 +12,8 @@
 Schachter (age 15). This ECMAScript 2015 implementation was released
 in 2020 by Michael J. Radwin. <code>@hebcal/core</code> targets both
 browser-based JavaScript and server-side Node.js.</p>
-<p>Many users of this library will utilize the <a href="https://github.com/hebcal/hebcal-es6/blob/main/docs/classes/HebrewCalendar.md">HebrewCalendar</a>
-and <a href="https://github.com/hebcal/hebcal-es6/blob/main/docs/classes/HDate.md">HDate</a> interfaces.</p>
+<p>Many users of this library will utilize the <a href="https://hebcal.github.io/api/core/classes/HebrewCalendar.html">HebrewCalendar</a>
+and <a href="https://hebcal.github.io/api/hdate/classes/HDate.html">HDate</a> interfaces.</p>
 <a id="md:installation" class="tsd-anchor"></a><h2 class="tsd-anchor-link">Installation<a href="#md:installation" aria-label="Permalink" class="tsd-anchor-icon"><svg viewBox="0 0 24 24"><use href="assets/icons.svg#icon-anchor"></use></svg></a></h2><pre><code class="bash"><span class="hl-0">$</span><span class="hl-1"> </span><span class="hl-2">npm</span><span class="hl-1"> </span><span class="hl-2">install</span><span class="hl-1"> </span><span class="hl-2">@hebcal/core</span>
 </code><button type="button">Copy</button></pre>