Update documentation

Author: pkck28

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@@ -9,7 +9,7 @@ In this section, constraint analysis is demonstrated using the example aircraft.
 1. [Takeoff distance](takeoff.ipynb)
 2. [Landing distance](landing.ipynb)
 3. [Climb gradient](climb.ipynb)
-4. Cruise speed
+4. [Cruise speed](cruise.ipynb)
 
 The takeoff distance, landing distance and cruise speed are mentioned in the [example aircraft specifications](../example_aircraft.md), while the climb gradient is included to satisfy 14 CFR Part 23 requirements. If desired or required by RFP, other requirements such as service ceiling and turn rates can also be included, refer to lecture notes or any of the aircraft design books for more details. 
 

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@@ -62,6 +62,7 @@
     <script>DOCUMENTATION_OPTIONS.pagename = 'constraint_analysis/climb';</script>
     <link rel="index" title="Index" href="../genindex.html" />
     <link rel="search" title="Search" href="../search.html" />
+    <link rel="next" title="Cruise Speed" href="cruise.html" />
     <link rel="prev" title="Landing Distance" href="landing.html" />
   <meta name="viewport" content="width=device-width, initial-scale=1"/>
   <meta name="docsearch:language" content="en"/>
@@ -194,6 +195,7 @@
 <li class="toctree-l2"><a class="reference internal" href="takeoff.html">Takeoff Distance</a></li>
 <li class="toctree-l2"><a class="reference internal" href="landing.html">Landing Distance</a></li>
 <li class="toctree-l2 current active"><a class="current reference internal" href="#">Climb Gradient</a></li>
+<li class="toctree-l2"><a class="reference internal" href="cruise.html">Cruise Speed</a></li>
 </ul>
 </details></li>
 </ul>
@@ -762,6 +764,15 @@ <h2>Combining all three requirements<a class="headerlink" href="#combining-all-t
         <p class="prev-next-title">Landing Distance</p>
       </div>
     </a>
+    <a class="right-next"
+       href="cruise.html"
+       title="next page">
+      <div class="prev-next-info">
+        <p class="prev-next-subtitle">next</p>
+        <p class="prev-next-title">Cruise Speed</p>
+      </div>
+      <i class="fa-solid fa-angle-right"></i>
+    </a>
 </div>
                 </footer>