Add a link for a standalone version of the form. (#610)

Author: freakboy3742

content/community/keep-informed/contents+ar.lr

@@ -2,8 +2,6 @@ _model: page
 ---
 title: Keeping informed
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-_template: keep-informed.html
----
 body:
 
 Mastodon
@@ -14,9 +12,9 @@ Follow `@[email protected] <https://fosstodon.org/@beeware>`__ on Mastodon f
 BeeWare Enthusiasts
 ===================
 
-Want to receive updates, hints, tips, and announcements related to BeeWare? Sign up for the BeeWare Enthusiasts mailing list:
+Want to receive updates, hints, tips, and announcements related to BeeWare? `Sign up for the BeeWare Enthusiasts mailing list <https://eepurl.com/b2Xb4z>`__.
 
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 summary: Want to stay in touch about developments in the BeeWare project? Here's how.
 ---
-sort_key: 4
+sort_key: 4