Update volatile.adoc

[animeshsrivastava24]

#613 Fixed

[per1234]

Thanks @animeshsrivastava24 !

I'd like to ask a small favor of you for future pull requests: please use GitHub's special syntax to cause the related issue to be closed automatically when the pull request is merged:
https://help.github.com/en/articles/closing-issues-using-keywords
This will make sure the associated issue report is closed without requiring that I remember to do it myself.

You were very close, but GitHub does not recognize "#613 Fixed". Instead it should have been "Fixes #613".

[animeshsrivastava24]

Sure @per1234, I'll keep this in mind for all the future contributions. Thank you for guiding me.