feat(wf-human-multi-area-model): relax notebook dependency version constraint

packages/wf-human-multi-area-model/package.py

@@ -28,7 +28,7 @@ class WfHumanMultiAreaModel(Package):
     depends_on("py-nnmt@1.3.0:", type=("run", "test"))
     depends_on("py-dicthash@0.0.1:", type=("run", "test"))
     depends_on("py-networkx@3.1:", type=("run", "test"))
-    depends_on("py-notebook@6.5.4:", type=("run", "test"))
+    depends_on("py-notebook@6.4:", type=("run", "test"))
     depends_on("py-future@0.18.2:", type=("run", "test"))
 
     def install(self, spec, prefix):