update book

doc/LectureNotes/_build/html/week39.html

@@ -62,7 +62,7 @@
     <script>DOCUMENTATION_OPTIONS.pagename = 'week39';</script>
     <link rel="index" title="Index" href="genindex.html" />
     <link rel="search" title="Search" href="search.html" />
-    <link rel="next" title="Project 1 on Machine Learning, deadline October 6 (midnight), 2025" href="project1.html" />
+    <link rel="next" title="Week 40: Gradient descent methods (continued) and start Neural networks" href="week40.html" />
     <link rel="prev" title="Exercises week 39" href="exercisesweek39.html" />
   <meta name="viewport" content="width=device-width, initial-scale=1"/>
   <meta name="docsearch:language" content="en"/>
@@ -235,6 +235,7 @@
 <li class="toctree-l1"><a class="reference internal" href="week38.html">Week 38: Statistical analysis, bias-variance tradeoff and resampling methods</a></li>
 <li class="toctree-l1"><a class="reference internal" href="exercisesweek39.html">Exercises week 39</a></li>
 <li class="toctree-l1 current active"><a class="current reference internal" href="#">Week 39: Resampling methods and logistic regression</a></li>
+<li class="toctree-l1"><a class="reference internal" href="week40.html">Week 40: Gradient descent methods (continued) and start Neural networks</a></li>
 </ul>
 <p aria-level="2" class="caption" role="heading"><span class="caption-text">Projects</span></p>
 <ul class="nav bd-sidenav">
@@ -1915,11 +1916,11 @@ with open(&#39;multiclass_results.csv&#39;, mode=&#39;w&#39;, newline=&#39;&#39;
       </div>
     </a>
     <a class="right-next"
-       href="project1.html"
+       href="week40.html"
        title="next page">
       <div class="prev-next-info">
         <p class="prev-next-subtitle">next</p>
-        <p class="prev-next-title">Project 1 on Machine Learning, deadline October 6 (midnight), 2025</p>
+        <p class="prev-next-title">Week 40: Gradient descent methods (continued) and start Neural networks</p>
       </div>
       <i class="fa-solid fa-angle-right"></i>
     </a>