Add an "out of date" note to Erlang 27 support blog post

Author: mkuratczyk

blog/2024-05-23-erlang27-support/index.md

@@ -1,9 +1,18 @@
 ---
-title: "Erlang/OTP 27 Is Currently Not Supported"
+title: "Erlang/OTP 27 Is Currently Not Supported [outdated]"
 tags: ["Announcements", "RabbitMQ 3.13.x"]
 authors: [kura]
 ---
 
+:::important
+
+**Current versions of RabbitMQ support Erlang/OTP 27**.
+Please refer to
+[the documentation](https://www.rabbitmq.com/docs/which-erlang) for up-to-date information.
+
+This blog post is kept for historical reference only.
+:::
+
 [Erlang/OTP 27.0 was released on May 20th, 2024](https://www.erlang.org/blog/highlights-otp-27/).
 While it contains a lot of exciting features and improvements, unfortunately RabbitMQ currently
 doesn't work well with this version.