Provide example of using email address in "authors" field

fep-xxxx-template.md

@@ -1,6 +1,6 @@
 ---
 slug: "xxxx"
-authors: Alyssa P. Hacker <@alyssa.p.hacker@social.example>, Chatty Ben <@ben@chatty.example>
+authors: Alyssa P. Hacker <alyssa.p.hacker@email.example>, Chatty Ben <@ben@fediverse.example>
 status: DRAFT
 dateReceived: 1970-01-01
 ---
@@ -15,7 +15,7 @@ dateReceived: 1970-01-01
 ## References
 
 - [ActivityPub] Christine Lemmer Webber, Jessica Tallon, [ActivityPub](https://www.w3.org/TR/activitypub/), 2018
-- [ABC] Alyssa P. Hacker, [An example proposal](http://example.org/abc.html), 2020
+- [ABC] Alyssa P. Hacker, [An example proposal](http://abc.example/abc.html), 2020
 
 
 ## Copyright

fep/a4ed/fep-a4ed.md

@@ -56,7 +56,7 @@ Proposal metadata is placed at the top of the document as key-value pairs betwee
 
 Following metadata key-value pairs may be placed at the top of a proposal:
 
-- `authors`: A comma separated list of authors of the proposal. Each item of the list should contain an author's name followed by a contact address in angle brackets (e.g. `Name <@alyssa.p.hacker@social.example>`).
+- `authors`: A comma separated list of authors of the proposal. Each item of the list should contain an author's name followed by a contact address in angle brackets (e.g. `Alyssa P. Hacker <alyssa.p.hacker@email.example>`, `Alyssa P. Hacker <@alyssa.p.hacker@fediverse.example>`).
 - `status`: Indicates the proposal status. Can be either `DRAFT`, `WITHDRAWN` or `FINAL`.
 - `dateReceived`: Date of when the proposal was added to the repository (when status is set to `DRAFT`).
 - `dateWithdrawn`: Date of when the proposal status was set to `WITHDRAWN` (only for proposals with status `WITHDRAWN`).