docs: note other shell config scripts

closes #2388

docs/index.html

@@ -349,7 +349,8 @@ exit</pre>
     <h3 id="tutorial-4">Step 4: Environment Variables</h3>
 
     <p>
-    Edit your .bashrc script in order to change $PATH:
+    Edit the appropriate config script (.bashrc|.cshrc|.profile|.zshrc|...)
+    for your shell in order to change $PATH:
     </p>
     <pre>export PATH=/<em>where MXE is installed</em>/usr/bin:$PATH</pre>