Fix jupyter-collaboration pinnings (#459)

Author: martinRenou

projects/jupyter-collaboration/pyproject.toml

@@ -30,9 +30,9 @@ classifiers = [
 ]
 dynamic = ["version"]
 dependencies = [
-    "jupyter_collaboration_ui>=1.1.0",
-    "jupyter_docprovider>=1.1.0",
-    "jupyter_server_ydoc>=1.1.0",
+    "jupyter_collaboration_ui>=1.1.0,<2",
+    "jupyter_docprovider>=1.1.0,<2",
+    "jupyter_server_ydoc>=1.1.0,<2",
 ]
 
 [tool.hatch.version]