Update Development section

Author: bevans2000

index.html

@@ -411,13 +411,12 @@ <h2>Download</h2>
 							<p> mars-sim v3.6.2 is available for free in 4 binary editions (most of us run the Swing Jar Edition). 
 							Download the latest build or release today at:</p>
 
-							 <ul>
-								<li>A. Sourceforge's auto-download :
-								<a href="https://sourceforge.net/projects/mars-sim/files/mars-sim/3.6.2/">
+							<h4>A. Sourceforge's auto-download</h4>
+								<p><a href="https://sourceforge.net/projects/mars-sim/files/mars-sim/3.6.2/">
 								<img alt="Download Mars Simulation Project" src="https://a.fsdn.com/con/app/sf-download-button"></a></li>
-								<br/><br/>
+								</p>
 
-								<li>B. Sourceforge's manual download :</li>
+							<h4>B. Sourceforge's manual download</h4>
 
  								<ul>
 									<li>&nbsp;&nbsp;&nbsp;1.&nbsp; (Most Preferred)
@@ -437,30 +436,28 @@ <h2>Download</h2>
 									Headless Debian</a></li>
 								</ul>
 
-								<li>C. GitHub :
-								<a href="https://github.com/mars-sim/mars-sim/releases" rel="nofollow">release tab</a></li>
-								<br/>
+							<h4>C. GitHub</h4>
+							<p><a href="https://github.com/mars-sim/mars-sim/releases" rel="nofollow">release tab</a></p>
 
-							 	<li>D. Also, you may download this previous <a href="http://mars-sim.sourceforge.net/guide/msp_userguide.pdf">v3.06 User Guide</a>
-								as a reference.	</li>			
-								
-							  </ul>
-
+							 <h4>D. Previous Releases</h4>
+							 <p>Also, you may download this previous <a href="http://mars-sim.sourceforge.net/guide/msp_userguide.pdf">v3.06 User Guide</a>
+								as a reference.	</p>			
+				
 							<footer>
-							<p> Minimum Requirements :
+							<p> Minimum Requirements :</p>
 							<br/> a. Dual Core Pentium/Celeron 1.5 GHz or above
 							<br/> b. 2 GB free RAM dedicated for running mars-sim
 							<br/> c. 64-bit Oracle Java 17 or OpenJDK 17
-							
 							</footer>	
 						</div>
 					</section>
 					<section id="development" class="three">
-						<div class="container">
-							
-							<br/><br/><br/>
+						<div class="container">	
+							<header>
+								<h2>Development</h2>
+							</header>	
 							<p>For more details on mars-sim development, 
-								go to <a href="https://github.com/mars-sim/mars-sim/">GitHub project page</a>.
+								go to <a href="https://github.com/mars-sim/mars-sim/">GitHub project page</a>.</p>
 
 							<footer class="container" > 
 								Also, check out openhub for a summary of mars-sim development.