Update setup.cfg

Author: blink1073

setup.cfg

@@ -27,7 +27,7 @@ classifiers =
 project_urls =
     Documentation = https://jupyter-server.readthedocs.io
     Funding = https://numfocus.org/donate
-    Source = https://github.com/ipython/ipython
+    Source = https://github.com/jupyter-server/jupyter_server
     Tracker = https://github.com/jupyter-server/jupyter_server/issues
 
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