Update environment.yml

Author: jan-janssen

binder/environment.yml

@@ -8,7 +8,7 @@ dependencies:
 - httpcore =1.0.7
 - jobflow =0.2.0
 - pyiron_base =0.15.5
-- pyiron_workflow =0.15.4
+- pyiron_workflow
 - pygraphviz =1.14
 - aiida-workgraph =0.5.2
 - plumpy =0.25.0