`pixel_size` is now in micrometer

nxtomomill/converter/edf/edfconverter.py

@@ -288,11 +288,11 @@ def edf_to_nx(
             key_aliases=["pixelSize"],
         )
         h5d["/entry/instrument/detector/x_pixel_size"] = (
-            pixel_size * metricsystem.millimeter.value
+            pixel_size * metricsystem.micrometer.value
         )
         h5d["/entry/instrument/detector/x_pixel_size"].attrs["unit"] = "m"
         h5d["/entry/instrument/detector/y_pixel_size"] = (
-            pixel_size * metricsystem.millimeter.value
+            pixel_size * metricsystem.micrometer.value
         )
         h5d["/entry/instrument/detector/y_pixel_size"].attrs["unit"] = "m"