Add SSH limitation to the about page

Author: MarkRobbo

src/main/resources/templates/about.html

@@ -187,6 +187,11 @@ <h2>Research Objects</h2>
                 (<a href="https://github.com/common-workflow-language/cwlviewer/issues/103">see Github issue</a>)</p>
             <p>We recommend that you keep all files in the containing folder for current use of CWL Viewer</p>
 
+            <h2>SSH Cloning</h2>
+            <p>SSH URLs are not able to be cloned or used as submodules due to the need for SSH keys to be set up.</p>
+            <p>We do not plan SSH support due to the impact on reproducibility from this being made a required
+            step to download the workflow.</p>
+
             <h2>Others</h2>
             <p>Other limitations or unimplemented features can be viewed
                 <a href="https://github.com/common-workflow-language/cwlviewer">on the Github issues page</a></p>