fix ci

Author: ruslandoga

lib/plausible_web/templates/email/export_success.html.heex

@@ -1,6 +1,7 @@
-Your <%= Plausible.product_name() %> export for <%= @site.domain %> is now ready for download.
-Please click <a href={@download_url}>here</a>
-to start the download process.
+<p>
+  Your <%= Plausible.product_name() %> export for <%= @site.domain %> is now ready for download.
+</p>
+<p>Please click <a href={@download_url}>here</a> to start the download process.</p>
 <%= if @expires_in do %>
-  Note that this link will expire <%= @expires_in %>.
+  <p>Note that this link will expire <%= @expires_in %>.</p>
 <% end %>