apps: Fix getting DNS base of image URI

Signed-off-by: Mike Sul <[email protected]>

apps/get_layers_meta.py

@@ -50,7 +50,7 @@ def print_layer_details(layer: DockerStore.Layer):
         for img in app.images(expand_env=True):
             img_uri = img
             # if it's a factory image and is not pinned then we need to figure out its tag
-            if img_uri.startswith(f"hub.{fio_dnsbase}") and -1 == img_uri.find("@sha256:"):
+            if img_uri.startswith(f"hub.{fio_dnsbase()}") and -1 == img_uri.find("@sha256:"):
                 # Find out if the image reference is tagged
                 end_pos = img_uri.rfind(":")
                 # The image should be referenced with the tag that the builder has tagged