Apply suggestions from code review

Co-authored-by: AU <adam-urbanczyk@users.noreply.github.com>

Author: adam-urbanczyk

cadquery/assembly.py

@@ -654,9 +654,9 @@ def load(
         if importType == "STEP":
             _importStep(assy, path, unit)
         elif importType == "XML":
-            importXml(assy, path)
+            importXml(assy, path, unit)
         elif importType == "XBF":
-            importXbf(assy, path)
+            importXbf(assy, path, unit)
 
         return assy