Email Client Feature Support Rankings: last modified date

[husseinalhammad]

The site now auto builds and deploys every Monday. The last modified date is correct on most pages where the date refers to the last date it was modified on GitHub. However, for the Email Client Feature Support Rankings page this is confusing as the data would have been updated more recently than the last modified date most of the time.

I think at minimum the page needs a note at the top to clarify this.