Update quarterly stats email template

[alainna]

Why

eScholarship stats template out of date, references social media sharing no longer supported

What

Update email language to be more generic:

from:

You can also increase readership by referring people to the URLs of your papers in eScholarship by using the SHARE button or by copying either the eScholarship URL or the DOI based URL, if your publication has one.

to:

You can also increase readership by referring people to your papers in eScholarship by using the SHARE button to share via email and social media or by copying the eScholarship URL or the DOI, if your publication has one.

[alainna]

eScholarship#3