调整JupyterHub依赖

docker_jupyterhub/requirements.txt

@@ -33,7 +33,7 @@ MarkupSafe>=2.1
 minio>=7.0.0
 nbclient>=0.5.1
 nbconvert>=6.4.5
-nbdime~=3.1
+# nbdime~=3.1
 nbformat>=5.1.2
 networkx>=2.5.1
 papermill>=2.3.4