update README.MD

[Jessomadic]

Updated Datomic link to redirect to correct location

Description:

Related issue (if applicable): fixes #

Checklist:

• [x] The code change is tested and works locally.
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation if necessary
• [x] There is no commented out code in this PR.
• [x] My changes generate no new warnings (check the console)

[Jessomadic]

If we can find a direct link that work, again, we should eventually throw that in.

I've add that on #564