updating note on git cache clearing

Author: rohan-paul

Git-and-Github/clear-a-git-repository-s-cache.md

@@ -1,4 +1,8 @@
-If you have performed a task, such as adding a new line item to your .gitignore file, you may need to clear out your git repo's cache in order for the changes to take place. Here are the commands for doing that:
+### After changing something in .gitignore or sometime if you think that local .git folder has been messed up we MUST clear cache - Note updated on 19-May-2021
+
+https://stackoverflow.com/a/48703146/1902852
+
+If you have performed a task, such as adding a new line item to your .gitignore file, I MUST need to clear out your git repo's cache in order for the changes to take place. Here are the commands for doing that:
 
 ```
 git rm -r --cached .