Update 'Testing your setup' in download.html

Quitting/Closing the terminal (iTerm2) and reopening should also work to show succesful install on MacOS (Ventura). As such, I have updated the solution in "Testing your setup" to ask users to try that step first, followed by the existing steps.

Author: NotYourAverageGamer

_layouts/download.html

@@ -52,7 +52,7 @@ <h2>Install Scala with <span style="font-weight: bold;">cs setup</span> (recomme
               <div class="wrap">
                 <p>Check your setup with the command <code>scala -version</code>, which should output:</p>
                 {% include code-snippet.html nocopy=true language='bash' codeSnippet=scalaDemo %}
-                <p>If that does not work, you may need to log out and log back in (or reboot) in order for the changes to take
+                <p>If that does not work, close and reopen your terminal; otherwise, you may need to log out and log back in (or reboot) in order for the changes to take
                   effect.
                 </p>
               </div>