Fix digest test

test/mix/tasks/pleroma/digest_test.exs

@@ -53,7 +53,13 @@ test "Sends digest to the given user" do
 
       assert_email_sent(
         to: {user2.name, user2.email},
-        html_body: ~r/here is what you've missed!/i
+        html_body:
+          Regex.compile!(
+            "here is what you've missed!"
+            |> Phoenix.HTML.html_escape()
+            |> Phoenix.HTML.safe_to_string(),
+            "i"
+          )
       )
     end
   end