Update README.md

Author: tahir1611

README.md

@@ -1,6 +1,6 @@
 [![Github Action (master)](https://github.com/cyber-dojo-languages/clangplusplus-cgreen/actions/workflows/main.yml/badge.svg)](https://github.com/cyber-dojo-languages/clangplusplus-cgreen/actions)
 
 ### display_name="C++ (clang++ 14.0.0), Cgreen 1.6.3"
-## image_name="cyberdojofoundation/clangpp_cgreen"
+## image_name="ghcr.io/cyber-dojo-languages/clangpp_cgreen"
 
 ![cyber-dojo.org home page](https://github.com/cyber-dojo/cyber-dojo/blob/master/shared/home_page_snapshot.png)