Update login.html

update based on this internal discussion: https://huggingface.slack.com/archives/C01BWJU0YKW/p1722873059576709?thread_ts=1708428760.132719&cid=C01BWJU0YKW

login.html

@@ -9,7 +9,7 @@
 <div id="jupyter-main-app" class="container">
     
     <img src="https://huggingface.co/front/assets/huggingface_logo-noborder.svg" alt="Hugging Face Logo">
-    <h4>You can duplicate this Space to run it private.</h4>
+    <h4>You must duplicate this Space to use it.</h4>
     <br>
     <a class="duplicate-button" style="display:inline-block" target="_blank" href="https://huggingface.co/spaces/DockerTemplates/jupyterlab?duplicate=true">     
     <img style="margin: 0" src="https://img.shields.io/badge/-Duplicate%20Space-blue?labelColor=white&amp;style=flat&amp;logo=data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAAXNSR0IArs4c6QAAAP5JREFUOE+lk7FqAkEURY+ltunEgFXS2sZGIbXfEPdLlnxJyDdYB62sbbUKpLbVNhyYFzbrrA74YJlh9r079973psed0cvUD4A+4HoCjsA85X0Dfn/RBLBgBDxnQPfAEJgBY+A9gALA4tcbamSzS4xq4FOQAJgCDwV2CPKV8tZAJcAjMMkUe1vX+U+SMhfAJEHasQIWmXNN3abzDwHUrgcRGmYcgKe0bxrblHEB4E/pndMazNpSZGcsZdBlYJcEL9Afo75molJyM2FxmPgmgPqlWNLGfwZGG6UiyEvLzHYDmoPkDDiNm9JR9uboiONcBXrpY1qmgs21x1QwyZcpvxt9NS09PlsPAAAAAElFTkSuQmCC&amp;logoWidth=14" alt="Duplicate Space"></a>