Correct "data catalog" name in the menu link to match the rest

plugins/eFlows_menu_link.py

@@ -14,9 +14,9 @@ class AirflowEFlowsPlugin(AirflowPlugin):
     appbuilder_menu_items = [appbuilder_eFlows]
 
 class AirflowDataCatPlugin(AirflowPlugin):
-    name = "Data Catalogue"
+    name = "Data Catalog"
     operators = []
     flask_blueprints = []
     hooks = []
     admin_views = []
-    appbuilder_menu_items = [{"name": "Data Catalogue", "href": "https://datacatalog.fz-juelich.de/index.html"}]
+    appbuilder_menu_items = [{"name": "Data Catalog", "href": "https://datacatalog.fz-juelich.de/index.html"}]