ITS: typo fix in utils/image_fov_utils.py

bug: 240698440
Change-Id: Ia866a4d0fb69d0942fc83ac2152bd51f5986c711
diff --git a/apps/CameraITS/utils/image_fov_utils.py b/apps/CameraITS/utils/image_fov_utils.py
index 8ac4ece..947f215 100644
--- a/apps/CameraITS/utils/image_fov_utils.py
+++ b/apps/CameraITS/utils/image_fov_utils.py
@@ -181,7 +181,7 @@
     ref_img_name_stem: test _NAME + location to save data
 
   Returns:
-    ref_fov: dict with [fmt, % coverage, w, h, circle_w, circle_h]
+    ref_fov: dict with {fmt, % coverage, w, h, circle_w, circle_h}
     cc_ct_gt: circle center position relative to the center of image.
     aspect_ratio_gt: aspect ratio of the detected circle in float.
   """