Iss #8 - Add OpenID page from EF wiki

Resolves #8 (closed)

content/_index.md

 ---
 title: "Eclipse Foundation API Specifications"
 date: 2023-01-10T09:03:20-08:00
+layout: single
 ---
+
+See the [Eclipse Foundation OpenID page](openid) for more information on connecting to authenticated endpoints. 
+
 {{< spec_list >}}
\ No newline at end of file