Removed img_name from captcha helper

Signed-off-by: Preetham <me@preetham.in>
diff --git a/user_guide_src/source/changelog.rst b/user_guide_src/source/changelog.rst
index 3dc87b5..5dc3650 100644
--- a/user_guide_src/source/changelog.rst
+++ b/user_guide_src/source/changelog.rst
@@ -135,7 +135,7 @@
       - Added *filename* to the returned array elements.
       - Updated to use `imagepng()` in case that `imagejpeg()` isn't available.
       - Added **font_size** option to allow customization of font size.
-      - Added **img_id** and **img_name** options to set id and name attributes of captcha image.
+      - Added **img_id** option to set id attribute of captcha image.
       
    -  :doc:`Text Helper <helpers/text_helper>` changes include: