Add stand-in redirect for early-attention

public/_redirects

@@ -47,6 +47,7 @@ https://www.3blue1brown.org/* https://www.3blue1brown.com/:splat 301!
 /aops                            https://artofproblemsolving.com/3blue1brown
 /quiz                            /
 /quaternion-explorable           https://eater.net/quaternions
+/early-attention                 https://www.patreon.com/3blue1brown
 
 
 # Internal redirects