Update jupyterlab.md

doc.zih.tu-dresden.de/docs/access/jupyterlab.md

@@ -2,7 +2,7 @@
 
 ## Access without JupyterHub
 
-=== "romeo"
+=== "alpha"
 
     ```console
     marie@local$ ssh -XC marie@login1.alpha.hpc.tu-dresden.de
@@ -47,6 +47,7 @@
     marie@compute$ jupyter lab -y --browser=chromium-browser
     ```
 
-    If you then want to start a DCV session, click the button and a new tab appear.
-    Copy the url from that tab to your local browser instead using the X11 forwarded browser.
-    Login with your ZIH credentials and everything should work fine.
+    If you then want to start a DCV session, click on the DCV tile in the lower section 'DC Apps'
+    and wait for the new browser tab to appear. Copy the URL and paste it into your local browser
+    instead of working with the slow X11-forwarded browser. After you have successfully logged in
+    with your ZIH credentials, it should work fine.