Update incorrect tutorial_4c illustration, highlighting the wrong button

misleading illustation for creating blog post as children of BlogIndexPage in line 335 corrected by adding image tutorial_4c.png

CONTRIBUTORS.rst

@@ -631,6 +631,7 @@ Contributors
 * Dan Hayden
 * Jadesola Kareem
 * Dauda Yusuf
+* Damilola Oladele
 
 
 Translators

docs/getting_started/tutorial.md

@@ -334,7 +334,7 @@ URL of the blog this post is a part of.
 Now create a few blog posts as children of `BlogIndexPage`.
 Be sure to select type "Blog Page" when creating your posts.
 
-![Page listing for Home page, with the "Actions" dropdown expanded, and the "Add child page" highlighted in red](../_static/images/tutorial/tutorial_4a.png)
+![Page listing for Home page with the "Add Child Page" button highlighted in red](../_static/images/tutorial/tutorial_4a.png)
 
 !["Create a page in our blog" page type selector, with Blog page button highlighted in red](../_static/images/tutorial/tutorial_4b.png)