Fixed another

Author: kenerwin88

PowerShell.html

@@ -8,7 +8,7 @@ <h2>PowerShell Course Outline</h2>
 </center>
   <p>While we don't have much here yet, hopefully this lesson will help you get started!<p>
 <center>
-  <img src="/images/powershell.png" height="25%" width="25%" /></center><br/>
+  <img src="/images/PowerShell.png" height="25%" width="25%" /></center><br/>
 
 {% assign pages = site.categories['PowerShell'] | sort:"weight"%}
 <ol>