new copy for the cancellation email (#3422)

* Update cancellation_email.html.eex

* changing the subject too

* Fix broken test

---------

Co-authored-by: Vinicius Brasil <vini@hey.com>

lib/plausible_web/email.ex

@@ -195,7 +195,7 @@ defmodule PlausibleWeb.Email do
     base_email()
     |> to(user.email)
     |> tag("cancelled-email")
-    |> subject("Your Plausible Analytics subscription has been canceled")
+    |> subject("Mind sharing your thoughts on Plausible?")
     |> render("cancellation_email.html", user: user)
   end
 

lib/plausible_web/templates/email/cancellation_email.html.eex

@@ -1,7 +1 @@
-Thanks for being a Plausible Analytics subscriber and we're sorry to see you go.<br/><br/>
-
-We'd love to hear about your experience and how you think we can improve Plausible Analytics for our other subscribers (and for you if you decide to come back). Please reply back to this email with your feedback.<br /><br />
-
-If you decide you'd like to continue keeping track of your site traffic while respecting the privacy of your visitors, obviously we'd love to have you back. You can restart your subscription from your <a href="https://plausible.io/settings">account settings</a>.<br /><br />
-
-Hope to see you around!
+This is Marko, one of the co-founders of Plausible. I’d love to understand the reasons behind your decision to cancel your subscription. We’re solely funded by our subscribers so we genuinely value your feedback. Even a few words would be beneficial in helping us improve our product. Please respond to this email with any insights you can share. Thank you for your time!

test/plausible/billing/billing_test.exs

@@ -486,9 +486,7 @@ defmodule Plausible.BillingTest do
         "status" => "deleted"
       })
 
-      assert_email_delivered_with(
-        subject: "Your Plausible Analytics subscription has been canceled"
-      )
+      assert_email_delivered_with(subject: "Mind sharing your thoughts on Plausible?")
     end
   end