Improve wording in registry notifications in the UI

app/controllers/projects/registry/repositories_controller.rb

@@ -11,10 +11,10 @@ module Projects
       def destroy
         if image.destroy
           redirect_to project_container_registry_path(@project),
-                      notice: 'Images repository has been removed successfully!'
+                      notice: 'Image repository has been removed successfully!'
         else
           redirect_to project_container_registry_path(@project),
-                      alert: 'Failed to remove images repository!'
+                      alert: 'Failed to remove image repository!'
         end
       end